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问题 单项选择题

当将吊杆松落到支架上并使其受力后，应做的收尾工作包括（）

①扣上铁箍；

②整理各绳索与索具并固定；

③插入保险销子；

④检查制动铁舌。

A.①、②、③、④；

B.①、③、④；

C.①、②、④；

D.②、③、④。

答案

参考答案：A

完形填空

Millions of words have been said about young people in the United States. There are reasons   31        this great interest in their ideas,   32       (feel) and actions. Today there are about eight million Americans in the colleges and universities. The young under twenty-five make   33     nearly half of the American population, many of   34      will be in power in the U.S.   35           (nature) their ideas are important to everyone in the country, and    36         is necessary for the older people to understand  37           they think and feel. College students today have strong   38          (opinion) about right and wrong. They are deeply interested in making a   39          (good) life for all the people, especially for those   40     _____ have never been given a fair chance before.
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单项选择题

鲜肉剖面为红色并带有各类家畜肉特有的色泽。（）

A、各类家畜肉

B、猪肉

C、牛肉

D．羊肉
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