题目内容
How much living space does a person need？ What happens when his space needs are not met？ Scientists are making experiments on rats to try to determine the efforts of over crowded conditions on man. Recent studies have shown that the behaviour of rats is greatly affected by space. If rats have enough living space, they eat well, sleep well and produce their young well. But if their living conditions become too crowded, their behaviour and even their health change obviously. They can't sleep and eat well, and signs of fear and worry become clear. The more crowded they are, the more they tend to bite each other and even kill each other. Thus, for rats, population and violence are directly related. Is this a natural law for human society as well？ Is enough space not only satisfactory, but necessary for human survival？
The writer is mainly talking about ______.
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The most suitable holiday for Peter and Maria would be ______ , as it is cheap and sounds
News from China Daily in February, 1989
China recorded fewer traffic accidents in 1988 than in 1987 and a lowered trend(趋势) continued for January this year.
The traffic accidents in 1988 totalled 270,000, 20,000 fewer than 1987.
But the death roll (人数) for 1988 was 54,000, an increase of 1,000 from the previous
year. The increase was not as slow as that in recent years.
The ministry(部) spokesman said in Beijing yesterday that 3,821 persons were killed in highway traffic accidents last month, a drop of 14.68 per cent from January 1987. He also said there were 21,201 traffic accidents in the first month of the year, 10.1 percent fewer than January last year and 11,700 people injured.
The traffic accidents involved (包括) an economic loss worth 27.32 million yuan (about $7 million).
Economic Daily said 170,000 persons were injured in traffic accidents in 1988, 10,000
fewer than in 1987.
The total traffic accidents in 1987 was ______.
Doctors are of the opinion that most people cannot live beyond 100 years, but a growing number of scientists believe that the aging (衰老) process can be controlled. There are more than 12,000 Americans over 100 years old who receive Social Security (社会保险) benefits, and their numbers are increasing each year. Dr. James Langley of Chicago claims that, theoretically and under ideal conditions, animals, including man, can live six times longer than their normal period of growth. A person's period of growth lasts approximately twenty-five years. If Dr. Langley's theory is accurate, future generations can expect a life span(寿命) of 150 years.
Which of the following statements best expresses the main idea of the passage？
听力原文：W: John, it's 7:30. I wonder how much later they are going to be？
M: Oh, you know Terry and Susan. They never arrive on time.
W: Yes, but half an hour late! My dinner will be ruined.
M: Oh, maybe they got stuck in traffic. You know what the traffic is like at this time of day.
W: Yes, but they said they were taking the subway so they wouldn't get caught in traffic.
M: Well, they shouldn't be late then. Why don’t you give them a call and see if they've left. Maybe they forgot about the invitation.
W: They couldn't have forgotten about it. I was just talking to Susan last night. Anyway, let me just check if they are in. Their number is 2143556.
What is probably the time for the appointment？
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