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问题 单项选择题

喷头安装中错误的是（）。

A.喷头安装应在系统试压、从系合格前进行

B.与喷头的连接管件只能用大小头，不得用补芯

C.不得对喷头进行拆装、改动和附加任何装饰性图层

D.喷头安装应使用专用扳手，严禁利用喷头的框架施拧

答案

参考答案：A

解析：喷头安装应在系统试压、冲洗合格后进行。

听力题

单词拼写

小题1:He went through all kinds of h_______(苦难) in the old society.

小题2:We decided that we should e_______ (选举)a new sales manager.

小题3:The brothers d________(不同；相异) widely in their tastes.

小题4:She u______(承担) full responsibility for the failure of the project..

小题5:The a ______(突然的) change of the schedule gave me lots of trouble.

小题6:I cannot b______(忍受) the smell of burnt sausage on the barbecue.

小题7:You are very much m________(错误的) if you think that people will agree to these changes.

小题8:People work in libraries spend a lot of time c______(分类) books..

小题9:I’m sorry to i______(打断) you but how could they live there?

小题10:Some flat mates are neat and tidy while others are very m_______(脏乱的).
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单项选择题

具有很强的再生能力的间叶组织是

A．纤维母细胞

B．软骨细胞

C．骨骼肌细胞

D．平滑肌细胞
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