单选题The legislative provision has a great impact on the operations of the department.

单选题Glaciers {{U}}terminate{{/U}} where the rate of ice loss is equivalent to the forward advance of the glacier.

单选题The parents have to restrain their daughter from playing nearby factories.

单选题The sea was calm and still.

单选题It took me a whole hour to solve the problem. A work at B. work on C. work out D. work over

单选题Before the first Apollo rocket went to the Moon, a spot for landing the lunar module was carefully chosen.

单选题 Fitness Movement The fitness movement that began in the late 1960s and early 1970s centered around aerobic exercise. Millions of individuals became engaged in a variety of aerobic activities, and {{U}} {{U}} 1 {{/U}} {{/U}}thousands of health spas developed around the country to capitalize on his {{U}} {{U}} 2 {{/U}} {{/U}}interest in fitness, particularly aerobic dancing for females. A number of fitness spas existed {{U}} {{U}} 3 {{/U}} {{/U}}to this aerobic fitness movement, even a national chain with spas in most major cities. However, their {{U}} {{U}} 4 {{/U}} {{/U}}was not on aerobics, but rather on weight-training programs designed to develop muscular mass, {{U}} {{U}} 5 {{/U}} {{/U}}, and endurance in their primarily male {{U}} {{U}} 6 {{/U}} {{/U}}. These fitness spas did not seem to benefit {{U}} {{U}} 7 {{/U}} {{/U}}from the aerobic fitness movement to better health, since medical opinion suggested that weight-training programs {{U}} {{U}} 8 {{/U}} {{/U}}few, if any, health benefits. In recent years, however, weight training has again become increasingly {{U}} {{U}} 9 {{/U}} {{/U}}for males and for females. Many {{U}} {{U}} 10 {{/U}} {{/U}}programs focus not only on developing muscular strength and endurance but on aerobic fitness as well. {{U}} {{U}} 11 {{/U}} {{/U}}, most physical fitness tests have usually included measures of muscular strength and endurance, not for health related reasons, but primarily {{U}} {{U}} 12 {{/U}} {{/U}}such fitness components have been related to performance in athletics. {{U}} {{U}} 13 {{/U}} {{/U}}, in recent years, evidence has shown that training programs designed primarily to improve muscular strength and endurance might also offer some health {{U}} {{U}} 14 {{/U}} {{/U}}as well. The American College of Sports Medicine now {{U}} {{U}} 15 {{/U}} {{/U}}that weight training be part of a total fitness program for healthy Americans.

单选题On Sleep Baekeland and Hartmann report that the "short sleepers" had been more or less average in their sleep needs until the men were in their teens. But at about age 15 or so, the men voluntarily began cutting down their nightly sleep time because of pressures from school, work, and other activities. These men tended to view their nightly periods of unconsciousness as bothersome interruptions in their daily routines. In general, these "short sleepers" appeared ambitious, active, energetic, cheerful, conformist(不动摇) in their opinions, and very sure about their career choices. They often held several jobs at once, or workers full or part-time while going to school. And many of them had a strong urge to appear "normal" or "acceptable" to their friends and associates. When asked to recall their dreams, the "short sleepers" did poorly. More than this, they seemed to prefer not remembering. In similar fashion, their usual way of dealing with psychological problems was to deny that the problem existed, and then to keep busy in the hope that the trouble would go away. The sleep patterns of the "short sleepers" were similar to, but less extreme than, sleep patterns shown by many mental patients categorized as manic (疯人). The "long sleepers" were quite different indeed. Baekeland and Hartmann report that these young men had been lengthy sleeps since childhood. They seemed to enjoy their sleep, protected it, and were quite concerned when they were occasionally deprived of their desired 9 hours of nightly bed rest. They tended to recall their dreams much better than did the "short sleepers." Many of the "long sleepers" were shy, anxious, introverted (内向), inhibited (压抑), passive, mildly depressed, and unsure of themselves (particularly in social situations). Several openly states that sleep was an escape from their daily problems.

单选题You always follow your own {{U}}inclinations{{/U}} instead of thinking of our feelings.

单选题How does the author feel about the prospect of protecting endangered species from being extinct?

单选题 Is the Tie a Necessity? Ties, or neckties, have been a symbol of politeness and elegance in Britain for centuries. But the casual Prime Minister Tony, Blair has problems with them. Reports suggest that even the civil servants may stop wearing ties. So, are the famously formal British really going to abandon the neckties? Maybe. Last week, the UK's Cabinet Secretary Andrew Turnbull openly welcomed a tieless era. He hinted that civil servants would soon be free of the costliest 12 inches of fabric that most men ever buy in their lives. In fact, Blair showed this attitude when he had his first guests to a cocktail party. Many of them were celebrities (知名人士) without ties, which would have been unimaginable even in the recent past. For some more conservative British, the tie is a must for proper appearance. Earlier, Labor leader Jim Callaghan said he would have died rather than have his children seen in public without a tie. For people like Callaghan, the tie was a sign of being complete, of showing respect. Men were supposed to wear a tie when going to church, to work in the office, to a party - almost every social occasion. But today, people have begun to accept a casual style even for formal occasions. The origin of the tie is tricky. It started as something called simply a "band". The term could mean anything around a man's neck. It appeared in finer ways in the 1630s. Frenchmen showed a love of this particular fashion statement. Their neckwear (颈饰) impressed Charles II, the king of England who was exiled (流放) to France at that time. When he returned to England in 1660, he brought this new fashion item along with him. It wasn't, however, until the late 18th century that fancy young men introduced a more colorful, flowing piece of cloth that eventually became known as the tie. Then, clubs, military institutions and schools began to use colored and patterned ties to indicate the wearer's membership in the late 19th century. After that, the tie became a necessary item of clothing for British gentlemen. But now, even gentlemen are getting tired of ties. Anyway, the day feels a bit easier when you wake up without having to decide which tie suits you and your mood.

单选题Thanksgiving is not a truly American tradition.

单选题The towers of a suspension bridge serve as a rigid framework to which the cables are attached.

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

单选题My brother is a {{U}}careful{{/U}} motorist (乘车者); he never does any dangerous driving.

单选题They got in quite a brawl.

单选题By advocating {{U}}moderate{{/U}} change, they think that they can keep consumer costs low. A. reasonable B. radical C. immediate D. minimum

单选题The teachers want to do away with cheating in their school.A. put an end toB. retainC. do credit toD. substitute for

单选题It's impossible to {{U}}predict{{/U}} whether she'll be well enough to come home from hospital next month.

单选题All the people {{U}}assembled{{/U}} at Marys house.