单选题Are you the resident of this house? A. manager B. occupant C. landlord D. caretaker

单选题In the Mesozoic period, the upward thrust of great rock masses created the Rocky Mountains and the Alps.

单选题After the surgery,Wayne felt

单选题One night in March, 1999, a man was driving from California to Oregon, US, to visit some friends. He had stopped his car to have some food when he started to hear strange noises. Turning on the headlights, he saw an 8 - foot - tall creature covered in thick, dark hair. The creature stared at him for a minute, turned in the road and walked off slowly into the woods. An 8 -foot -tall man drove his car to Oregon one night.A. RightB. WrongC. Not mentioned

单选题Common-Cold Sense You can"t beat it, but you don"t have to join it. Maybe it got the name "common cold" because it"s more common in winter. The fact is, though, being cold doesn"t have anything to do with getting one. Colds are caused by the spread of rhinoviruses, and, at least so far, medical science is better at telling you how to avoid getting one than how to get rid of one. Children are the most common way cold viruses are spread to adults, because they have more colds than adults an average of about eight per year. Why do kids seem so much more easily to get colds than their parents? Simple. They haven"t had the opportunity to become immune to many cold viruses. There are more than 150 different cold viruses, and you never have the same one twice. Being infected by one makes you immune to it—but only it. Colds are usually spread by direct contact, not sneezing or coughing. From another person"s hand to your hand and then to your nose or eyes is the most common route. The highest concentration of cold viruses anywhere is found under the thumbnails of a boy, although the viruses can survive for hours on skin or other smooth surfaces. Hygiene is your best defense. Wash your hands frequently, preferably with a disinfectant soap, especially when children in your household have colds. But even careful hygiene won"t ward off every cold. So, what works when a coughing, sneezing, runny nose strikes? The old prescription of two aspirins, lots of water, and bed rest is a good place to start. But you"ll also find some of the folk remedies worth trying. Hot mixtures of sugar(or honey), lemon, and water have real benefits.

单选题Your health can suffer simply from fear of losing your job, says Sarah Burgard, a sociologist at the University of Michigan. After crunching data from two large national surveys, she concluded that chronic job insecurity over a two--year period rivals the anxiety of a job loss or a major illness. Burgard adjusted her data for what psychologists call "neuroticism" and found that even people who aren't typically worriers report worse health when they believe their jobs are in danger. Fears of poor job prospects may have similar consequences. When Swedish researchers asked 21 - year - olds about their health during a recession, they reported more problems than a comparison group during a boom. According to Sarah Burgard, people's health tend to get worse whenA. they develop chronic diseases.B. they experience job insecurity.C. they see good job prospects.D. they have psychological problems.

单选题When a man knows that he will be put into prison if he uses a potentially {{U}}deadly{{/U}} object to rob or do harm to another person, he will think twice about it. A. passive B. lifelong C. unhappy D. fatal

单选题The study has posed a question about this nature.A. supportedB. cancellC. arousedD. raised

单选题I feel regret about what"s happened.

单选题Not only do health workers themselves wish to improve their own skills and competence, but the introduction of new techniques and equipment and the changes taking place in health needs and health care policies necessitate continued training. Health needs and health care policies always remain constant.A. RightB. WrongC. Not mentioned

单选题His health had {{U}}deteriorated{{/U}} while he was in prison. A. became better B. became worse C. became stronger D. became weaker

单选题That guy is really Uwitty/U.

单选题______ I admit that the problems are difficult. I don' t agree that they cannot be solved.A. WhenB. WhereC. WhileD. Why

单选题When I was about six years old, my mother came home one clay and found that I had collected half a dozen babies of the neighborhood-all of them too young to walk-and had them sitting before me on the floor while I was teaching them to wave their arms. When she asked the explanation of this, I informed her that it was my school of dance. She was amused, and placing herself at the piano, she began to play for me. This school continued and became very popular. Later on, little girls of the neighborhood came and their parents paid me a small sum to teach them. This was the beginning of what afterwards proved a very lucrative occupation. My mother took me to a very famous ballet teacher, but his lessons did not please me. When the teacher told me to stand on my toes I asked him why, and when he replied "because it is beautiful," I said that it was ugly and against nature and after the third lesson I left his class, never to return. This stiff and commonplace gymnastics which he called dancing only disturbed my dream. I dreamed of a different dance. I did not know just what it would be, but I was feeling out towards an invisible world into which I guessed I might enter if I found the key. My art was already in me when I was a little girl, and it was owing to the heroic and adventurous spirit of my mother that it was not stifled. I believe that whatever the child is going to do in life should begin when it is very young. I wonder how many parents realize that by the so-called education they are giving their children, they are only driving them into the commonplace, and depriving them of any chance of doing anything beautiful or original.

单选题In Britain and many other countries appraisal is now a tool of management.

单选题The old car jolted along the country road at a snail's pace.A. rodeB. dawdledC. honkedD. bounced

单选题Which is NOT true of sparklers?

单选题 Cancer develops over a long time, which means that you have years——typically decades——in which to hinder or promote it. Researchers are finding that what you eat may interfere with cancer growth at various stages. For example, certain foods can block the chemicals that initate cancer. Antioxidants(抗氧化剂), found in some vitamins and minerals, can snuff out oxygen free radicls (氧自由基), substances that are thought to make cells more susceptible to cancer, and they can even repair some of the cellular damage that has been done. And some food—wheat bran(麦,糠) in particular—has been shown to shrink precancerous(癌症前期的) cells. A recent review of 17 studies from 17 nations reveals that people who eat the most fruits and vegetables have about half the cancer raters of those who eat the least. In fact, some research suggests that frequent consumption of fruits and vegetables can cut the risk of lung cancer even in smokers. One of the most studied antioxidants in vegetables and fruits thought to protect against cancer is beta-carotene(β胡萝卜素), concentrated in deep green, yellow and orange vegetables such as carrots, sweet potatoes and spinach. Research also shows that beta-carotene can change in the body to retinoic acid (维生素A酸), a substance used in clinical trials to treat certain cancers. Here are some of the foods that contain cancer-fighting chemicals. Tomatoes. One of the compounds in tomatoes that is thought to reduce the risk of cancer is lycopene(蕃茄素), the pigment (色素) that makes tomatoes red. Lycopene, an antioxidant that is also found in watermelons and apricots, quenches certain cancer-triggering oxygen free fadicals. Healthy people with the most blood lycopene. Green Vegetables. A recent Italian study showed that dark-green leafy vegetables lower the risk of many cancer. Spinach, broccoli, kale and dark-green lettuces are chock-full of antioxidants, including beta-carotene, folate(叶酸) and lutein(叶黄素).A good rule of thumb(单凭经验的做法) : the darker the vegetable, the more antioxidants within. Pungent preventives(刺激性的预防物). A whole host of chemicals thought to have cancer-inhibiting properties have been identified in allium vegetables, which include garlic, onions and scallions(大葱). Animal studies show that many of these chemicals block carcinogens that have been linked to colon, stomach, lung and liver cancer. A study at Pennsylvania State University found that feeding rats various garlic extracts and preparations(配制好的食物) reduced mammary tumors by as much as 71 percent. In humans, studies suggest that those who eat more onions and garlic are less prone to gastrointestinal cancer. Research suggests that garlic compounds may even interfere with cancer progression. A recent German study found that ajoene, a garlic compound, is toxic to malignant cells. Garlic may also antagonize existing cancer by boosting(促进) immune functions, according to researchers at Loma Linda University School of Medicine. Their study, done on mice, found that garlic's sulfur compounds increased the activity of macrophages and T-lymphocytes(淋巴细胞), two of the components of the immune system that destroy tumor ceils.

单选题We must make up an excuse for being late.

单选题The scientists began to accumulate dat