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问题 单项选择题

对于设备腐蚀情况、管道壁厚、支架标高等每年重点检查一次，并将检查情况（）。

A.记录备案

B.及时汇报

C.书写报告

D.及时通报

答案

参考答案：A

选择题
It is reported that many a new house _____ at present in the disaster area.

A. are being built
B. were being built
C. was being built
D. is being built
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选择题

将钠投入下列溶液中，产生气体并生成白色沉淀的是（　　）

A．FeCl3饱和溶液

B．MgSO4溶液

C．KCl溶液

D．CuSO4溶液
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