单选题An old friend called on me the day before yesterday.

单选题At 80, Peck was still vigorous and living in Paris.A. happyB. energeticC. aloneD. busy

单选题No rule of human conduct can be considered important in promoting the welfare of man unless

单选题These programmes are of immense value to old people.

单选题He was a much older tennis player but he had the great {{U}}advantage{{/U}} of experience.

单选题It is said that the houses along this street will soon be pulled down .

单选题Pushbike Peril Low speed bicycle crashes can badly injure — or even kill — children if they fall onto the ends of the handlebars. So a team of engineers is redesigning the humble handlebar in a bid to make it safer. Kristy Arbogast, a bioengineer at the Children's Hospital of Philadelphia in Pennsylvania, began the project with her colleagues after a study of serious abdominal injuries in children in the past 30 years showed that more than a third were caused by bicycle accidents. "The task was to identify how the injuries occurred and come up with some countermeasures," she says. By interviewing the children and their parents, Arbogast and her team were able tog reconstruct many of the accidents and identified a common mechanism responsible for serious injuries. They discovered that most occur when children hit an obstacle at a slow speed, causing them to topple over5. To maintain their balance they turn the handlebars through 90 degrees — but their momentum forces them into the end of the handlebars. The bike then falls over and the other end of the handlebars hits the ground, ramming it into their abdomen6. The solution the group came up with is a handgrip fitted with a spring and damping system. The spring absorbs up to 50 per cent of the forces transmitted through the handlebars in an impact. The group hopes to commercialize the device, which should add only a few dollars to the cost of a bike. "But our task has been one of education because up until now, bicycle manufacturers were unaware of the problem," says Arbogast. The team has also approached the US Consumer Product Safety Commission to try to persuade manufacturers to adopt the new design. A decision is expected later this year.

单选题In the 1950's accumulating scientific evidence linking cigarette smoking and lung cancer made a (51) impact (52) the smoking public. During this period many health agencies declared smoking to be a (53) Hazard. US Surgeon General Leroy E. Brunei said in 1957: "The weigh of the evidence is increasingly pointing to one direction: that (54) smoking is one of the causative factors in lung cancer." The initial reports had the heaviest impact, so (55) total cigarette production dropped in 1953 and again in 1954. (56) reports appeared to have less (57) on smoking habits, and by 1957 cigarette production had (58) above the 1952 level. (59) four voluntary health organizations urgued president John F. Kennedy to (60) a commission to study the widespread implications of the tobacco problem, the Surgeon General's Advisory Committee on Smoking and Health was (61) in 1962 to review and evaluate all (62) scientific data. When its report, Smoking and Health, was released in early 1964, cigarette consumption again declined (63) . Pipe and cigar smoking increased. More than 350, 000 copies of the report were contributed and sold. (64) abstracts and pamphlets were prepared by the Public Health Service and other organizations (65) a massive educational campaign on the hazards of cigarette smoking.

单选题We were Ushocked/U to find that Mary didn't know her guest's name.

单选题I would recommend this inn highly on account of its wonderful location.A. as a result ofB. because ofC. with regard toD. with a view to

单选题 First Aid First aid is emergency care for a victim of sudden illness or injury until more skillful medical treatment is available. First aid may save a life or improve certain vital signs including pulse, temperature, an unobstructed airway (气道), and breathing. In minor emergencies, first aid may prevent a victim's condition from worsening and provide relief from pain. First aid must be administered as quickly as possible. In the case of the critically injured, a few minutes can make the difference between complete recovery and loss of life. First-aid measures depend upon a victim's needs and provider's level of knowledge and skill. Knowing what not to do in an emergency is as important as knowing what to do. Improperly moving a person with a neck injury, for example, can lead to permanent spinal (脊柱的) injury and paralysis (瘫痪). Despite the variety of injuries possible, several principles of first aid apply to all emergencies. The first step is to call for professional medical help. The victim, if conscious, should be reassured that medical aid has been requested, and asked for permission to provide any first aid. Next, assess the scene, asking other people or the injured person's family or friends about details of the injury or illness, any care that may have already been given, and preexisting conditions such as diabetes (糖尿病) or heart trouble. The victim should be checked for medical bracelet (手镯) or card that describes special medical conditions. Unless the accident scene becomes unsafe or the victim may suffer further injury, do not move the victim. First aid requires rapid assessment of victims to determine whether life-threatening conditions exist. One method for evaluating a victim's condition is known by the acronym (首字母缩写词) ABC, which stands for: A—Airway: Is it open and unobstructed? B—Breathing: Is the person breathing? Look, listen, and feel for breathing. C—Circulation: Is there a pulse? Is the person bleeding externally? Check skin color and temperature for additional indications of circulation problems. Once obvious injuries have been evaluated, the injured person's head should be kept in a neutral position in line with the body. If no evidence exists to suggest potential skull or spinal injury, place the injured person in a comfortable position. Positioned on one side, a victim can vomit without choking or obstructing the airway.

单选题Jack eventually overtook the last truck.

单选题Her novel depicts an ambitious Chinese.

单选题 阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 Before any period of exercise it is well worth spending two or three minutes warming up with a series of simple stretching exercises. This not only helps your joints(关节) to move easily but also prepares all your muscle groups for more energetic activity. It is rather like a cat stretching itself before it springs into action. Here are four movements to do in an easy and unhurried way, gently stretching each action without forcing it. Repeat each movement ten times, breathing normally throughout. Ⅰ. Standing with your feet apart, push both arms out straight in front of you, fingertips touching. Raise them above your head, then down to the sides pushing each arm backwards at the same time. Ⅱ. Standing with your feet apart, and hands on hips(臀部). Tip your head back and look straight up to the ceiling. Roll your head round slowly to face the right, then the floor, then the left, and finally up at the ceiling again. Repeat in the other direction. Ⅲ. Standing with your feet apart and hands on your sides, lean first to the right and then to the left, sliding the hand down the side of the leg. Ⅳ. Standing feet apart and arms out straight in front, with your eyes fixed on your right hands, swing your right arm round to the right, keeping it straight, as far as it will go. Return it to the front and repeat with the left arm.

单选题There seems to be a close relationship between drinks and one's life. The adolescent(少年)usually loves soft drinks for their sweetness and variety. He knows nothing of sadness and his taste of life is sweetness to the exclusion of all the others. In his eyes, the world is full of facets just as soft drinks are varied in flavor. Youth sees him on a job or in love. Now, soft drinks will have to give way to coffee, which is bitter yet somewhat sweet and fragrant. It gives a stimulating sensation suggestive of maturity, appealing to him, as he is fickle and moody. At his stage, he begins his career full of ambition and ideals, on the other hand he also needs and aspires after a home of his own. However, either his work or his love affairs may bring small setbacks, for which he is sometimes seen forcing a tearful smile and sometimes smiling through his tears. Considerations of gains and losses seem to him an enjoyment as well as a torture. Middle age turns him to Chinese tea that gives a delicate fragrance very gradual to come out, only discernable off and on. It is bland an elegant, deep and profound. It never stimulates your sense of taste but a lip of it will leave a faint fragrance lingering in your mouth, Free from impractical longings and fully aware of the evanescent of the sunset, he cherishes every minute of the day and each day of his is sweetened with a simple but real happiness. The elderly drinks plain boiled water which is devoid of saccharin, caffeine or theophyline (茶碱). It tastes insipid yet a slow sipping will doubtless yield a wee bit of sweetness. He has been tossed in life's storms and taught by rough and bitter experience to know better than to care about glories and successes which appear to him now as transient as a fleeting cloud. For this is the time he can sit comfortable in an armchair letting his mind wander. All that happened in the past and all that exist in the world seem to him as plain and insipd as water...

单选题Many detectives ignored the {{U}}inconspicuous{{/U}} detail.

单选题Please don't refuse his help because he is so kind a man.A. turn downB. go downC. put downD. pull down

单选题A great deal has been done to remedy the situation.

单选题We must abide by the rules.

单选题Those countries were once worried that they would not have adequate supplies of petroleum.A. effectiveB. efficientC. potentialD. sufficient