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问题 问答题 简答题

使用活络扳手时应注意什么？

答案

参考答案：

（1）应让固定钳口受主要作用力，否则容易损坏。 

（2）钳口的开口应调整适当，不能过大，否则会损坏螺母。根据螺母大小选择相应规格的扳手。 

（3）手柄不可任意加长，以免旋紧力矩过大损坏扳手或旋紧物。

填空题

根据所给的首字母填写单词。

     There are some very good things about open education. This way of teaching a      l      the students to develop their interests in many subjects. Open education asks students to be responsible(负责任)for their own education. The open classroom may help them to e      2     learning. Some students will be h    3    in an open education school. They will not have to worry a    4     grades rules.

     But many students may not d      5      well in an open classroom.  For some students,  if there are too f     6      rules, they will do little in school. They will not make good use of open education. Because open education is s    7      different from traditional education, these students may have a problem of getting used to making so many c    8    .For many students it is important to have some rules in the classroom. A few rules will help them.  The  last point  about  open  education is that some traditional teachers  do not like it.

Many teachers do not believe in open education.

     You now know what open education is. Some of its good points and bad points have been explained. You may have your own opinion about open education. The writer thinks that open education is only a

good idea. It may not work very well in r    9    class or school. The writer believes that most students, but of course not all students, want and need to have some rules. They must be m  10  to study some subjects. Many students are pleased to find subjects that they have to study interesting. They would not study those subjects if they did not have to.

1. a________ 2. e________ 3. h________ 4. a_______ 5. d_______

6. f________ 7. s________ 8. c________ 9. r_______ 10. m_______
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单项选择题

儿童部量相等，中点恰好在耻骨联合上的年龄大约在( )岁

A．3

B．0

C．12

D．7

E．1
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