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两平面2x-y+z-7=0与x+y+2z-11=0的夹角是()。
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What will be the result of a more environmentally-minded new president in the place？
Section B
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.
Biologically, there is only one quality which distinguishes us from animals: the ability to laugh. In a universe which appears to be utterly deficient of humor, we enjoy this supreme luxury. And it is a luxury, for unlike any other bodily process, laughter does not seem to serve a biologically useful purpose. In a divided world, laughter is a unifying force. Human beings oppose each other on a great many issues. Nations may disagree about systems of government and human relations may be plagued by ideological clans and political camps, but we all share the ability to laugh. And laughter, in turn, depends on that most complex and subtle of all human qualities: a sense of humor. Certain comic stereotypes have a universal appeal. This can best be seen from the world-wide popularity of Charlie Chaplin's early films. As that great commentator on human affairs, Dr. Samuel Johnson, once remarked, "men have been wise in very different modes; but they have always laughed in the same way."
A sense of humor may take various forms and laughter may be anything from refined tinkle(清脆的声响)to an earth quaking roar, but the effect is always the same. Humor helps us to maintain a correct sense of values. It is the one quality which political fanatics(狂热者)appear to lack. If we can see the funny side, we never make the mistake of taking ourselves too seriously. We are always reminded that tragedy is not really far removed from comedy, so we never get one-sided view of things.
This is one of the chief functions of satire(讽刺)and irony. Human pain and suffering arc so grim; we hover so often on the brink of war; political realities are usually enough to plunge us into total despair. In such circumstances, cartoons and satirical accounts of serious political events redress the balance. They take the wind out of arrogant politicians who have lost their sense of proportion. They enable us to see that many of our most profound actions are merely comic or absurd. We laugh when a great satirist like Swift writes about war in Gulliver's Travels. The Lilliputians and their neighbors attack each other because they can't agree which end to break an egg. We laugh because we are meant to laugh; but we are meant to weep too. It is too powerful a weapon to be allowed to flourish.
The sense of humor must be singled out as man's most important quality because it is associated with laughter. And laughter, in turn, is associated with happiness. Courage, determination, initiative—these are qualities we share with other forms of life. But the sense of humor is uniquely human. If happiness is one of the great goals of life, then it is the sense of humor that provides the key.
We can learn from the first paragraph that laughter ______ .
听力原文： Reading to oneself is a modem activity which was almost unknown to the scholars of the classical and medieval worlds, while during the fifteenth century the term "reading" undoubtedly meant reading aloud. Only during the nineteenth century did silent reading become commonplace. One should be careful, however, in assuming that silent reading came about simply because reading aloud is a distraction to others. (33)Examination of factors related to the historical development of silent reading reveals that it became the usual mode of reading for most adult reading tasks mainly because the tasks themselves changed in character. (32)The 19th century saw a steady gradual increase in literacy, and thus in the number of readers. As readers increased, so the number of potential listeners decreased, and thus there was some reduction in the need to read aloud. As reading for the benefit of listeners grew less common, so came the flourishing of reading as a private activity in such public places as libraries, railway carriages and offices; There reading aloud would cause distraction to other readers. (34)Towards the end of the century there was still considerable argument over whether books should be used for information, and over whether the reading material such as newspapers was in some way mentally weakening. Indeed this argument remains with as still in education. However, whatever its virtues are, the old shared literacy culture had gone and was replaced by the mass media on the one hand and by books and magazines for a specialized readership on the other. The social, cultural, and technological changes in the century had greatly altered what the term "reading" implied.
(33)
Section A
Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer.
听力原文：M: Hills，are you going to Jack's party tonight？ May be I can give you a ride．
W: Thanks，Tom．I'd like to go for a change，
Q: What will the woman probably do tonight？
(12)
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