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问题 多项选择题

下列哪些场所使用的照明电压不应大于36V？（ ）。

A．高温

B．有导电灰尘

C．低温

D．灯具距离地面高度高于2.4m

E．灯具距离地面高度低于2.4m

答案

参考答案：A,B,E

完形填空

Ming is my best f____小题1:____. I feel so e___小题2:____ when I see her.

She is not very tall. She is not very beautiful e____小题3:____. She has poor eyesight. Her hair is shoulder-length.

Ming is not very smart, but she is h_____小题4:____. When I have to watch the shop for my parents, she always comes to help me for a few hours. In the shop, we talk about many things. We are t___小题5:____ friends and we s____小题6:_____ secrets. We never tell our secrets to o___小题7:___ people.

T_______小题8:_____ Ming is going to Shanghai, and she is not coming b___小题9:____ to Beijing. Today, she gave me a card. Is this the e___小题10:____ of our friendship?
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问答题 计算题

已知供电煤耗为360克/（千瓦2时），求供电能量相当于燃料能量的百分数。（提示：标准煤的热值为29.27106焦/千克，1千瓦2时=3.63106焦）
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