[填空题]According to the passage, computer science can only reveal ______.

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[填空题]According to the passage, ’computer crimes has been on the rise for the last ______ years.

[单项选择]Passage Four

Can an inventive society get bolder as it grows older That question affects people of all ages—especially those living in the United States, Europe, and Japan, which are expected to have fewer workers supporting more retirees. According to Science and Engineering Indicators (SEI):2OO2,issued by the National Science Board (NSB),America’s science and engineering workforce will continue to grow in coming decades, but its average age is likely to rise.
Will scientific workers in their 50s and 60s continue to make valuable contributions The report avoided asking whether aging impairs creativity. If it does, then the growth of our productivity and improvement of our standard of living might be in trouble. There is already a shortage of young Americans in research; in 2003 the NSB expressed concern over the United States’ dependence o
A. in science fields the U.S. face shortage of talent
B. average age of the science and engineering workforce in coming decades will be higher
C. for old scientific workers, aging has impaired their creativity
D. the young Americans in research has outnumbered retirees

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[单项选择]Passage Two

Can animals be made to work for us Some scientists think that one day animals may be trained to do a number of simple jobs that are now done by human beings.
They point out that at a circus, for example, we may see elephants, monkeys, dogs and other animals doing quite skillful things. Perhaps you have seen them on the television or in a film. If you watch closely, you may notice that the trainer always gives the animal a piece of candy or a piece of fruit as a reward. The scientists say that many different animals may be trained to do a number of simple jobs if they know they will get a reward for doing them.
Of course, as we know, dogs can be used to guard a house, and soldiers in both old and modem times have used geese to give warning by making a lot of noise when a stranger or an enemy comes near. But it may be possible
A. Animals are very skillful at a circus.
B. They are big and strong.
C. Some animals arc as clever as human beings.
D. Animals can be trained because they like to get something as a reward.

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[填空题]From the passage we can draw a conclusion that if we want to keep healthy, we should throw something into our stomachs slowly and carefully.

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[填空题]According to the passage we can see that Liu Xiang has had______experiences before reaching world - wide fame.

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[填空题]From the passage we can infer this textbook is written mainly for ______ to read.

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[单项选择]From the passage we can learn that the speaker______.
A. is unprepared for the new post.
B. is unclear about the conditions there.
C. is ready for all the difficulties there.
D. is eager to know more about the post.

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