题目内容
不可控差异是指与主观努力程度关系不大，主要受客观原因影响而形成的差异，又叫客观差异。 ()
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听力原文： We all scream for water when thirsty. But do you know But do you know in very hot dry weather, plants also make faint sounds as if they cry out for help？
You see, in a plant's stem, there are hundreds of water pipes that bring water and minerals from the soil all the way up to the leaves. As the ground turns dry, it becomes herder and harder for the plants to do this.
In severe droughts, plants have to fight to pull out any water available. Scientist Robert Winter has found out that when it is really bad, their water pipes snap from the tension like rubber bands. When that happens, the whole plant vibrates a little. The snapping pipes make noises ten thousand times more quiet than a whisper.
Robert knows that healthy well-water plants are quiet. He also knows that many insects prefer attacking dry plants rather than healthy plants. How do the insects know which ere healthy plants and which ere not？ Robert thinks that the insects may listen for the plants that cry and then they may buzz in to kill.
To test his theory, Robert is using a device that can imitate plant cries. He attacks it to a quiet healthy plant so that the plant sounds thirsty. Then he watches insects to see if they attack more often than usual,
If he is right, scientists could use the insects' ability against them. They could build traps that imitate crying plants. So when the insects buzz in to eat, they won't buzz out.
(30)
Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文： According to a new study done at the Medical School of University of California at Los Angeles, left handed people may be more likely to have accidents than the right handed. one reason maybe left-handers tend to make more minor mental mistakes. In the study of 2000 sailors, those who had more mental errors also had more accidents, and left-handers were reported to have more mental errors and more accidents than right-handers. The author of the study Jim Watson said, "Minor mental mistakes are mistakes that any adults would make when they were tired or careless and they could lead to accidents because we lose track of what we are doing." Paul White, chief of the study program said that he found the study interesting and exciting . But he wanted that the conclusions should not be accepted without further investigation. He said the study had limitations, and limitations could have influenced the results. Jim Watson, who is right handed himself, stressed that me study was not an official project and said that the findings cannot be applied to every left-hander. He said minor mental mistakes can be regarded as evidence of lack of concentration. But in the past, it was believed that left-handers tended to have more accidents largely because most equipment was designed for right-handers.
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A．It had its imitations.B．Its results were regarded as final.C．It was supported by the
A．He wanted to give her a Christmas present.B．He fell in love with her.C．Her birthday
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