语言类
公务员类
工程类
语言类
金融会计类
计算机类
医学类
研究生类
专业技术资格
职业技能资格
学历类
党建思政类
全国职称英语等级考试
大学英语考试
全国英语等级考试(PETS)
英语证书考试
英语翻译资格考试
全国职称英语等级考试
青少年及成人英语考试
小语种考试
汉语考试
卫生类职称英语等级考试
综合类职称英语等级考试
理工类职称英语等级考试
卫生类职称英语等级考试
填空题下面的短文后有2项测试任务:(1) 第23~26题要求从所给的6个选项中第2、4、5、6每段选择1个最佳标题;(2) 第27~30题要求从所给的6个选项中每个句子确定一个最佳选项。 Icebergs Icebergs are among nature's most spectacular(壮观的) creations, and yet most people have never seen one. A vague air of mystery envelops them. They come into being-somewhere-in faraway, frigid waters, amid thunderous noise and splashing turbulence, which in most case no one hears or sees. They exist only a short time and then slowly waste away(消融) just as unnoticed. Objects of sheerest(最纯粹的) beauty they have been called. Appearing in an endless variety of shapes, they may be dazzlingly white, or they may be glassy blue, green or purple, tinted faintly or in darker hues. They are graceful, stately, inspiring-in calm, sunlight seas. But they are also called frightening and dangerous, and that they are--in the night, in the fog, and in storms. Even in clear weather one is wise to stay a safe distance away from them. Most of their bulk is hidden below the water, so their underwater parts may extend out far beyond the visible top. Also, they may roll over unexpectedly, churning the waters around them. Icebergs are parts of glaciers that break off, drift into the water, float about awhile, and finally melt. Icebergs afloat today are made of snowflakes that have fallen over long ages of time. They embody snows that drifted down hundreds, or many thousands, or in some cases maybe a million years ago. The snows fell in polar region and on cold mountains, where they melted only a little or not at all, and so collected to great depths over the years and centuries. As each year's snow accumulation lay on the surface, evaporation and melting caused the snowflakes slowly to lose their feathery points and become tiny grains of ice. When new snow fell on top of the old, it too turned to icy grains. So blankets of snow and ice grains mounted layer upon layer and were of such great thickness that the weight of the upper layers compressed the lower ones. With time and pressure from above, the many small ice grains joined and changed to larger crystals, and eventually the deeper crystals merged into a solid mass of ice. A. Formation of iceberg B. Iceberg is beautiful C. Color of iceberg D. Iceberg is dangerous E. Iceberg is mysterious F. Classification of iceberg
进入题库练习
填空题There are many words to describe how a person thinks, feels and acts. Gordon all ports, an American psychologist, found nearly 18000 English words characterizing differences in people's behavior. And many of us use this information as a basis for describing, or typing, his personality.A. Even a skilled writer probably could not describe all the features that make one face different from another.B. Like the human face, human personality is very complex.C. But we can easily tell the "good guys" from the "bad guys" because the two types differ in appearance as well as in actions.E. Bookworms, conservatives, military types -people are described with such terms.F. We also tell people apart by how they behav
进入题库练习
填空题Understanding Autism 1 Autism(孤独症) is a life-long developmental disability that prevents individuals from properly understanding what they see, hear, and otherwise sense. This results in severe problems of social relationships, communication, and behavior. Individuals with autism have to painstakingly(费力地) learn normal patterns of speech and communication, and appropriate ways to relate to people, objects, and events, in a similar manner to those who have had a stroke. 2 The cause of autism is still unknown. Some research suggests a physical problem affecting those parts of the brain that process language and information coming in from the senses. There may be some imbalance of certain chemicals in the brain. Genetic(遗传的) factors may some times be involved. Autism may indeed result from a combination of several "causes". 3 Most people with mental retardation(智力迟钝) show relatively even skill development. Individuals with autism, however, typically show uneven skill development, with deficits(欠缺) in certain areas—most frequently in their ability to communicate and relate to others and distinct skills in other areas. It is important to distinguish autism from mental retardation or other disorders, since diagnostic(诊断的) confusion may lead to inappropriate and ineffective treatment techniques. 4 In general, individuals with autism perform best at jobs which are structured and involve a degree of repetition. Some people who have autism are working as artists, piano tuners, painters, farm workers, office workers, computer operators, dishwashers, assembly line workers, or employees of sheltered workshops or other sheltered work settings.
进入题库练习
填空题 阅读下面的短文,文章中有5处空白,文章后面有6组文字,请根据文章的内容选择5组文字,将其分别放回文章原有位置,以恢复文章原貌。 {{B}} How to Jump Queue Fury{{/B}} If you find yourself waiting in a long queue at an airport or bus terminus this holiday, will you try to analyze what it is about queuing that makes you angry? Or will you just get angry with the nearest official? Professor Richard Larson, an electrical engineer at the Massachusetts Institute of Technology, hates queuing but rather than tear his hair out, he decided to study the subject. {{U}}(46) {{/U}}. He cites an experiment at Houston airport where passengers had to walk for one minute from the plane to the baggage reclaim and then wait a further seven minutes to collect their luggage. Complaints were frequent, especially from those who had spent seven minutes watching passengers with just hand baggage get out immediately. The airport authorities decided to lengthen the walk from the aircraft, so that instead of a one-minute fast walk, the passengers spent six minutes walking {{U}}(47) {{/U}}. The extra walk ex tended the delay by five minutes for those carrying only hand baggage, but passenger com plaints dropped almost to zero. The reason? Larson suggests that it all has to do with what he calls "social justice". If people see others taking a short cut, they will find the wait unbearable. {{U}}(48) {{/U}}. Another aspect Larson studied was the observation that people get more fed up if they are not told what is going on. {{U}}(49) {{/U}}. But even knowing how long we have to wait isn't the whole answer. We must also believe that everything is being done to minimize our delay. Larson cites the example of two neighboring American banks. One was highly computerized and served a customer, on average, every 30 seconds. {{U}}(50) {{/U}}. But because the tellers at the second bank looked extremely busy, customers believed the service was faster and many transferred their accounts to the slower bank. Ultimately, the latter had to introduce time-wasting ways of appearing more dynamic.A So in the case of the airport, it was preferable to delay everyone.B The other bank was less automated and took twice as long.C When they finally arrived at the baggage reclaim, the delay was then only two minutes.D His first finding, which backs up earlier work at the US National Science Foundation, was that the degree of annoyance was not directly related to the time.E It's unbearable for the airport to delay everyone.F Passengers told that there will be a half-hour delay are less unhappy than those left waiting even twenty minutes without an explanation.
进入题库练习
填空题Remembering something all your life ______.
进入题库练习
填空题 A hospital is an institution that provides medical services for a community. The doctors, nurses, and other personnel of a hospital work to restore health to sick and injured people. They also try to prevent disease and maintain health in the community. Some hospitals serve as centers for medical education and research. 2. Most hospitals are short-term hospitals in which the majority of patients stay less than 30 days. Patients spend an average of 4 to 8 days in a short-term hospital. In long term hospitals, most patients stay more than 30 days. People having their tonsils removed would go to a short-term hospital. Those with severe mental illnesses may stay in a long-term institution because of the time needed to treat their condition. 3. A general hospital provides services for most people and illnesses. A special hospital cares for certain people or certain illnesses. For example, pediatric hospitals treat only children. Rehabilitation hospitals provide services to help people adjust to mental and physical disabilities. 4. A hospital may perform other services besides treating the sick. Research hospitals conduct medical research. Teaching hospitals educate future physicians, nurses, and laboratory specialists. A teaching hospital may form part of a university medical center, or it may be a general hospital associated with a medical school. 5. In the professional services department, physicians play an important role and lead a large medical team working for the hospital. The medical team also includes physicians in training. These interns have come from medical schools and work in a hospital for practical experience. The nursing staff forms the largest group on the patient care team. Professional nurses, generally called registered nurses, have graduated from a nursing school. They carry out much of the patients' care under the guidance of physicians. They also direct other members of the nursing staff, including practical nurses. nurse's aides, and nurse attendants. These men and women do many tasks to tree the registered nurses for work requiring their special skills. 6. There are many other important departments in a hospital besides the professional services department. The hospital pharmacy provides medicines that physicians order for patients. The central service department maintains medical supplies. The food service department prepares meals for patients and staff members. The hospital laboratories conduct tests that help doctors diagnose and treat illnesses. The radiology department makes X rays to help physicians diagnose diseases and injuries. The medical records department keeps a record on every patient. If former patients return to the hospital, their medical record helps the physician diagnose and treat their illness. The admitting office schedules patients for admission at the request of their physician and assigns them to a room. And the business office lists each patient's charges, prepares a bill, and records payments received.
进入题库练习
填空题Immunization helps to ______.
进入题库练习
填空题A. because of their similarityB. that we would not be able to understand it at allC. to the popularization of English as a world languageD. the trend to become a global languageE. what once happened to LatinF. but the speed with which
进入题库练习
填空题A. Addressing a Variety of Behavior-affecting FactorsB. Importance of ImmunizationC. Relationship with Other Health ServicesD. Creation of Necessary Conditions for Healthy BehaviorE. Encouraging Unhealthy BehaviorF. Encouragement of Behavior Good for Your Health
进入题库练习
填空题In his great Victorian novel A Tale of Two Cites, Charles Dickens begins his story with these well - known lines: It was the best of times; it was the worst of times, it was the age of wisdom, it was the age of foolishness... , it was the season of Light, it was the season of Darkness, it was the spring of hope, it was the winter of despair, we had everything before us, we had nothing before us, we were all going direct to Heaven, we were all going the other way. ______ In fact he was just stating some facts about the way people view time and events differently.A. The English language is loaded with phrases that express the value of time.B. It is a good idea to take a close look at the fascinating concept of time, and examine how it is treated differently in America by various cultures and in different situations.C. Regions, groups, organizations, and individuals all have their own concepts of how to view time.D. No matter how we want to look at "time" it will always be a factor in how we view the world and how the world views us.E. Although we might think that in America we are all in agreement to how we view time, we are not.F. Some might wonder what he was talking about.
进入题库练习
填空题 Development in Newspaper Organization One of the most important developments in newspaper organization during the first part of the twentieth century {{U}} {{U}} 1 {{/U}} {{/U}}, which are known as wire services. Wireservice companies employed reporters, who covered stories all over the world. Their news reports were sent to papers throughout the country by telegraph. The papers paid an annual fee for this service. Wire services continue {{U}} {{U}} 2 {{/U}} {{/U}}. Today the major wire services are the Associated Press (AP) and United Press International (UPI). You will frequently find AP or UPI at the beginning of a news story. Newspaper chains and mergers began to appear in the early 1900s. A chain consists of two or more newspapers {{U}} {{U}} 3 {{/U}} {{/U}}. A merger involves combining two or more papers into one. During the nineteenth century many cities had more than one competitive independent paper. Today in most cities there are only one or two newspapers, and {{U}} {{U}} 4 {{/U}} {{/U}}. Often newspapers in several cities belong to one chain. Papers have combined {{U}} {{U}} 5 {{/U}} {{/U}}. Chains and mergers have cut down production costs and brought the advantages of big-business methods to the newspaper industry. A. to play an important role in newspaper operations B. was the growth of telegraph services C. and they usually enjoy great prestige D. they are usually operated by a single owner E. in order to survive under the pressure of rising costs F. owned by a single person or organization
进入题库练习
填空题The First Four Minutes When do people decide whether or not they want to become friends? During their first four minutes together, according to a book by Dr. Leonard Zunin. In his book, "Contact: The first four minutes," he offers this advice to anyone interested in starting new friendships: 1 A lot of people"s whole lives would change if they did just that. You may have noticed that average person does not give his undivided attention to someone he as just met. 2 If anyone has ever done this to you, you probably did not like him very much. When we are introduced to new people, the author suggests, we should try to appear friendly and self-confident. In general, he says, "People like people who like themselves." On the other hand, we should not make the other person think we are too sure of ourselves. It is important to appear interested and sympathetic, realizing that the other person has his won needs, fears, and hopes. Hearing such advice, one might say, "But I"m not a friendly, self-confident person. That"s not my nature. It would be dishonest for me to at that way." 3 We can become accustomed to any changes we choose to make in our personality. "It is like getting used to a new car. It may be unfamiliar at first, but it goes much better than the old one." But isn"t it dishonest to give the appearance of friendly self-confidence when we don"t actually feel that way? Perhaps, but according to Dr. Zunin, "total honest" is not always good for social relationships, especially during the first few minutes of contact. There is a time for everything, and a certain amount of play-acting may be best for the first few minutes of contact with a stranger. That is not the time to complain about one"s health or to mention faults one finds in other people. It is not the time to tell the whole truth about one"s opinions and impressions. 4 For a husband and wife or a parent and child, problems often arise during their first four minutes together after they have been apart. Dr. Zunin suggests that these first few minutes together be treated with care. If there are unpleasant matters to be discussed, they should be dealt with later. The author says that interpersonal relations should be taught as a required course in every school, along with reading, writing, and mathematics. 5 that is at least as important as how much we know. A. In reply, Dr. Zunin would claim that a little practice can help us feel comfortable about changing our social habits. B. Much of what has been said about strangers also applies to relationships with family members and friends. C. In his opinion, success in life depends mainly on how we get along with other people. D. Every time you meet someone in a social situation, give him your undivided attention for four minutes. E. He keeps looking over the other person"s shoulder, as if hoping to find someone more interesting in another part of the room. F. He is eager to make friends with everyone.
进入题库练习
填空题Old Man Myths and Realities 1. When does a middle-aged man become an old man? Officially, of course, it"s when we reach retirement age. But, as we all know, this is a fairly blunt (生硬的) method of decision making. As life expectancy (预期寿命) increases, retirement planning needs to be changed. This is because being an old man today is very different from what it was a generation or so ago. 2. Sixty-five is the new middle-aged man. These days people are talking about the young-old, that is ages 70-75, and those over 75 as the old-old. The young-old frequently continue in good health and maintain strong links with friends and family. The old-old have a much higher chance of poor health and social isolation. 3. Although men are living longer, there are still more old women than old men. This fact alone should arouse interest as to why. Relatively little is actually known about why this is the case or about the experiences of the old man. Sure, we are aware that the old man experiences anxiety, financial problems, loneliness, etc, hut that"s really about all we know. 4. It is usually believed that the old man often complains about their health. In fact, most old man think their health is good even though most are diagnosed with at least one chronic illness. The physical health of the old man is strongly affected by their health behavior when they were younger.
进入题库练习
填空题 阅读下面的短文,文章中有5处空白,文章后有6组文字,请根据文章的内容选择5组文字,将其分别放回文章原有位置,以恢复文章原貌。 Since we are social beings, the quality of our lives depends in large measure on our interpersonal relationships. One strength of the human condition is our tendency to give and receive support from one another under stressful circumstances.{{U}} (46) {{/U}}. Those of us with strong support systems appear better able to cope with major life changes and daily hassles(困难). People with strong social ties live longer and have better health than those without such ties. Studies over a range of illnesses, from depression to heart disease, reveal that the presence of social support helps people fend off(挡开) illness,{{U}} (47) {{/U}}. {{U}} (48) {{/U}}. First, friends, relatives, and co-workers may let us know that they value us. Our self-respect is strengthened when we feel accepted by others despite our faults and difficulties{{U}} (49) {{/U}}. They help us to define and understand our problems and find solutions to them. Third, we typically find social companionship supportive. Engaging in leisure time activities with others helps us to meet our social needs while at the same time distracting(转移...注意力)us from our worries and troubles.{{U}} (50) {{/U}}--financial aid, material resources, and needed services--that reduces stress by helping us resolve and cope with our problems. A. Social support cushions stress in a number of ways. B. Social support consists of the exchange of resources among people based on their interpersonal ties. C. Finally, other people may give us instrumental support D. People can't live without social support. E. and the absence of such support makes poor health more likely F. Second, other people often provide us with informational support.
进入题库练习
填空题 阅读下面的短文,文章中有5处空白,文章后面有6组文字,请根据文章的内容选择5组文字,将其分别放回文章原有位置,以恢复文章原貌。 {{B}}How One Simple Movement Can Let Slip the Secrets of the Mind{{/B}} Body language is the quiet, secret and most powerful language of all! It is said that our body movements communicate about 50 per cent of what we really mean while words themselves only express 7 per cent. So, while your mouth is closed, just what is your body saying... Arms. {{U}}(46) {{/U}} If you keep your arms to the sides of your body or behind your back, this suggests you are not afraid of taking on whatever comes your way. {{U}}(47) {{/U}} If someone upsets you, just cross your arms to show you're unhappy! Head. When you want to appear confident, keep your head level. If you are monitor in class, you can also take on this position when you want your words to be taken seriously. {{U}}(48) {{/U}} Legs. Your legs tend to move around a lot more than normal when you are nervous or telling lies. If you are at interviews, try to keep them still! Posture. A good posture makes you feel better about yourself. {{U}}(49) {{/U}} This makes breathing more difficult, which in turn can make you feel nervous or uncomfortable. Mouth. When you are thinking, you often purse your lips. You might also use this position to hold back an angry comment you don't wish to show. {{U}}(50) {{/U}}A If you are feeling downs, you normally don't sit straight, with your shoulders inwards.B If you are pleased, you usually open your eyes wide and people can notice this.C Outgoing people generally use their arms with big movements, while quieter people keep them close to their bodies.D How you hold your arms shows how open and receptive you are to people you-meet.E However, it will probably still be noticed, and people will know you're not pleased.F However, to be friendly in listening or speaking, you must move your head a little to one side.
进入题库练习
填空题 Organ Donation and Transplantation 1. Organ donation (捐献) and transplantation (移植) refers to the process by which organs or tissues from one person are put into another person's body. 2. The number of people needing a transplant continues to rise faster than the number of donors. About 3,700 transplant candidates are added to the national waiting list each month. Each day, about 77 people receive organ transplants. However, about 18 people die each day waiting for transplants that can't take place because of the shortage of donated organs. 3. There are no age limits on who can be an organ donor. Newborns as well as senior citizens have been organ donors. If you are younger than 18, you must have a parent's or guardian's consent (同意). If you are 18 years or older, you can show you want to be an organ and tissue donor by signing a donor card. 4. Many people think that if they agree to donate their organs, the doctor or the emergency room staff won't work as hard to save their life. This is not true. The transplant team is completely separate from the medical staff working to save your life. The transplant team does not become involved with you until doctors have determined that all possible efforts to save your life have failed. 5. If you need an organ transplant, your doctor will help you get on the national waiting list. Your name will become part of a pool of names. When an organ donor becomes available, all the patients in the pool are compared to the donor. Factors such as blood and tissue type, size of the organ, medical urgency (紧急) of the patient's illness, time already spent on the waiting list, and distance between donor and recipient (接受者) are considered. A. Quality of Donated Organ B. Benefits of Organ Donation C. Distribution of Donated Organs D. Quality of Donor Medical Care E. Age Limits of Organ Donation F. Status of Organ Donation and Transplantation
进入题库练习
填空题The warm feeling of belongingness may give you ______.
进入题库练习
填空题 阅读下面这篇短文,短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第2~5段每段选择1个正确的小标题;(2)第27~30题要求从所给的6个选项中选择4个正确选项,分别完成每个句子。 {{B}} Women's Rights Movement{{/B}}1 Women's rights are guarantees of political, social, and economic equality for women in a society that traditionally gives more power and freedom to mere Among these rights are control of property, equality of opportunity in education and employment, right of voting, and freedom of marriage. Today, complete political, economic, and social equality with men remains to be achieved.2 Male control was obvious from the time of the earliest written historical records, probably as a result of men's role in hunting and warfare. The belief that women were naturally weaker and inferior to men was also found in god-centered religions. Therefore, in most traditional societies, women generally were at a disadvantage. Their education was limited to learning domestic skills, and they had no access to positions of power. A woman had no legal control over her person, her own land and money, or her children.3 The Age of Enlightenment and the Industrial Revolution, which caused economic and social progress, provided a favorable climate for the rise of women's rights movement in the late 18th and 19th century. In 1848 more than 100 persons held the first women's rights convention in New York, and the feminists demanded equal rights, including the vote.4 In the late 1960s women made up about 40 percent of the work force in England, France, Germany, and the United States. This figure rose to more than 50 percent by the mid-1981s. A commission under the President was established in 1960 to consider equal opportunities for women. Acts of Congress entitled them to equality in education, employment, and legal rights. In 1964 the Civil Rights Act, initially intended only for blacks was extended to women.5 The objectives of the women's movement included equal pay for equal work, federal support for day-care centers, recognition of lesbian(女性同性恋) rights, making abortion legal, and the focus of serious attention on the problems of forced sex relations, wife and child beating, and discrimination against older and minority women.
进入题库练习
填空题下面的短文后有2项测试任务:(1) 第23~26题要求从所给的6个选项中为第1~4段每段选择1个最佳标题;(2) 第27~30题要求从所给的6个选项中为每个句子确定1个最佳选项。 Parkinson's Disease 1. Parkinson's disease affects the way you move. It happens when there is a problem with certain nerve cells in the brain. Normally, these nerve cells make an important chemical called dopamine (多巴胺). Dopamine sends signals to the part of your brain that controls movement. It lets your muscles move smoothly and do what you want them to do. When you have Parkinson's, these nerve cells Break down. Then you no longer have enough dopamine, and you have trouble moving the way you want to. 2. No one knows for sure what makes these nerve cells break down. But scientists are doing a lot of research to look for the answer. They are studying many possible causes, including aging and poisons in the environment. Abnormal genes seem to lead to Parkinson's disease in some people. But so far, there is not enough proof to show that it is always inherited. 3. Tremor (颤抖) may be the first symptom you notice. It is one of the most common signs of the disease, although not everyone has it. Tremor often starts in just one arm or leg or only on one side of the body. It may be worse when you are awake but not moving the affected arm or leg. It may get better when you move the limb or you are asleep. In time, Parkinson's affects muscles all through your body, so it can lead to problems like trouble swallowing or constipation (便秘). In the later stages of the disease, a person with Parkinson's may have a fixed or blank expression, trouble speaking, and other problems. Some people also have a decrease in mental skills. 4. At this time, there is no cure for Parkinson's disease. But there are several types of medicines that can control the symptoms and make the disease easier to live with. You may not even need treatment if your symptoms are mild. Your doctor may wait to prescribe medicines until your symptoms start to get in the way of your daily life. Your doctor will adjust your medicines as your symptoms get worse. You may need to take several medicines to get the best results. A. Tips for Patients with the Disease B. Common Treatment for the Disease C. Means of Diagnosis of the Disease D. Typical Symptoms of the Disease E. Possible Causes of the Disease F. Definition of Parkinson's Disease
进入题库练习
填空题下面的短文有5处空白,短文后有6个句子,其中5个取自短文,请根据短文内容将其分别放回原有位置,以恢复文章原貌。 Leukemia Leukemia is the most common type of cancer kids get, but it is still very rare. Leukemia involves the blood and blood-forming organs, such as the bone marrow.{{U}} (46) {{/U}} A kid with leukemia produces lots of abnormal white blood cells in the bone marrow. Usually, white blood cells fight infection, but the white blood cells in a person with leukemia don't work the way they're supposed to.{{U}} (47) {{/U}}The abnormal white blood cells multiply out of control, filling the bone marrow and making it hard for enough normal, infection-fighting white blood cells to form. Other blood cells—such as red blood cells (that carry oxygen in the blood to the body's tissues) and platelets (that allow blood to clot)—are also crowded out by the white blood cells of leukemia. These cancer cells may also move to other parts of the body, including the bloodstream, where they continue to multiply and build up. Although leukemia can make kids sick, most of the time it is treatable, and kids get better. Almost all leukemia patients are treated with chemotherapy, which means using anti-cancer drugs. {{U}} (48) {{/U}}Chemotherapy quickly goes to work, traveling through the blood to the bone marrow. There, the drugs can attack the cancer cells. After several weeks of chemotherapy, many kids begin to feel better. Some children with leukemia will also have radiation therapy, too.{{U}} (49) {{/U}} If the cancer isn't getting better from usual amounts of chemotherapy and radiation, then a kid with leukemia Will probably need more treatment—with higher doses of chemotherapy and radiation to finally kill the cancer cells. But this heavy-duty treatment will also harm the normal cells in the kid's bone marrow too, and the bone marrow will no longer be able to produce normal blood ceils. So, doctors will then give a kid—or anyone else with bone marrow that is no longer working—normal bone marrow tissue from someone else who is healthy.{{U}} (50) {{/U}} A. The chemotherapy drugs are given through a catheter, a narrow tube that is inserted into a blood vessel, sometimes in the kid's upper chest. B. Early symptoms of leukemia are often overlooked, since they may resemble symptoms of the flu or other common diseases. C. This is a special procedure called a bone marrow transplant, and it helps the patient make new blood cells so they can recover from the leukemia. D. Bone marrow is the innermost part of some bones where blood ceils are first made. E. They don't protect the person from infections very well. F. Radiation therapy uses invisible high-energy waves (similar to X-rays) to kill cancerous cells.
进入题库练习