填空题

The passage gives a brief introduction of air industry in the United States, which includes its nature, working environment and its occupations.

【参考答案】

Y

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问答题

你的一个朋友考取研究生，向他她表示祝贺。2．他她的成功给你的启示。3．邀请他她来你校。

单项选择题

According to the passage, 'scientific subculture' means ______.

A．cultural groups that are formed by scientists
B．people whose knowledge of science is very limited
C．the scientific community
D．people who make good contribution to science

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