在潮湿、危险场所及户外，220V的照明灯具的安装高度最低应不低于_爱下问搜题

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问题单项选择题

在潮湿、危险场所及户外，220V的照明灯具的安装高度最低应不低于（）米。

A．1.5

B．2.0

C．2.5

答案

参考答案：C

填空题

上午9点30分时，时钟的时针和分针所夹的较小的角是度.

填空题

Questions 14-18

·Using the information in the text, complete each sentence 14-18, with a word or phrase from the list below.
·For each sentence (14-18), mark one letter (A-G) on the Answer Sheet.
·Do not mark any letter twice.
14. According to Dr. Score, lightning is caused by hail falling through ______.
15. The refrigerated rod served the same functions as ______.
16. Ice particles bouncing off hail falling through a cloud acquire ______.
17. In the paragraph four the word "duplicated" means ______.
18. According to S.E. Regnolds, there could be no lightning without ______.

A. copy
B. a positive charge
C. a negative charge
D. super cooled clouds
E. falling hail clouds
F. hail and super cooled clouds
G. moisture particles