单选题By the last sentence of the passage the author means that

单选题Some industrial workers were trying, quietly and peacefully, to create a network of free trade unions, modeled presumably on Poland's famous Solidarity, which was an anathema to the regime.

单选题They continued to______ about and enjoy themselves until they became tired. (2005年中国科学院考博试题)

单选题The swimming pool is the children's favorite ______ in the summer. A. cradle B. haunt C. heading D. hedge

单选题After thirty years of television, people have become "speed watchers". Consequently, if the camera lingers, the interest of the audience ______.

单选题Concerned people want to ______ the risk of developing cancer. A. take B. decrease C. minimize D. claimed

单选题Which of the following is TRUE of the first stage of the evolution of mind?

单选题The two witnesses who saw the shootings were able to______who had fired first.

单选题Many people believe the glare from snow causes snow blindness. Yet, dark glasses or not they find themselves suffering from headaches and watering eyes, and even snowblindness, when exposed to several hours of "snow light". The United States Army has now determined that the glare from snow does not cause snow-blindness in troops in a snow-covered country. Rather, a man's eyes frequently find nothing to focus on in a broad expanse of a snow-covered area So his gaze continually shifts and jumps back and forth over the entire landscape in search of something to look at. Finding nothing, hour after hour, the eyes never stop searching and the eyeballs become sore and the eye muscle aches. Nature balances this annoyance by producing more and more liquid which covers the eyeballs. The liquid covers the eyeballs in increasing quantity until vision blurs. And the result is total, even though temporary, snowblindness. Experiments led the Army to a simple method of overcoming this problem. Scouts ahead of a main body of troops are trained to shake snow from evergreen bushes, creating a dotted line as they cross completely snow-covered landscape. Even the scouts themselves throw lightweight, dark-colored objects ahead on which they too can focus. The men following can then see something. Their gaze is arrested. Their eyes focus on a bush and having found something to see, stop searching through the snow-blanketed landscape. By focusing their attention on one object at a time, the man can cross the snow without becoming hopelessly snowblind or lost. In this way the problem of crossing a solid white area is overcome.

单选题At first, movies were little more than amusing ______ pictures that appeared to move.

单选题If (allowed to) turn yellow, while still on the plant, bananas lose their (characteristically) good flavor, the skin (break open), insects (enter the inside), and the fruit rots.

单选题When a decision has finally been made, we obtain a ______ and do a full search of the place, taking away my material that might be required as evidence.

单选题After the concert, the clean-up crew found the ground ______ with papers. bottles and cans.(2009年北京航空航天大学考博试题)

单选题If you can't give up smoking completely, at least try to ______. A. take down B. turn down C. cut down D. set down

单选题It is all very well to blame traffic jams, the cost of petrol and the quick pace of modem life, but manners on the roads are becoming horrible. You might tolerate the rude and inconsiderate driver, but nowadays the well-mannered motorist is the exception to the rule. Perhaps the situation calls for a "Be Kind to Other Drivers" campaign, otherwise, it may get completely out of hand. Road politeness is not only good manners, but good sense too. It takes the most cool-headed and good-tempered of drivers to resist the temptation to revenge when subjected to uncivilized behaviors. on the other hand, a little politeness goes a long way towards relieving the tensions of motoring. A friendly nod or a wave of acknowledgement in response to an act of politeness helps to create an atmosphere of goodwill and tolerance so necessary in modem traffic conditions. But such acknowledgements of politeness are all too rare today. Many drivers nowadays don"t even seem able to recognize politeness when they see it. However, improper politeness can also be dangerous. A typical example is the driver who waves a child across a crossing into the path of oncoming vehicles that may be unable to stop in time. The same goes for encouraging old ladies to cross the road wherever and whenever they care to. A veteran driver, whose manners are faultless, told me it would help if motorists learn to filter correctly into traffic streams one at a time without causing the total blockages (堵塞) that give rise to bad temper. Unfortunately, modem motorists can"t even learn to drive, let alone be well-mannered on the road. Years ago the experts warned us that the car-ownership explosion would demand a lot more give-and-take from all road users. It is high time for all of us to take this message to heart.

单选题She did not go out because of the ______cold.

单选题Which of the following is not true of those young computer hackers?

单选题The speculation,______ by some suggestive evidence, came from an American scientist.