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问题 单项选择题

照明配电线路的保护不包括( )。

A．短路保护
B．过负载保护
C．接地故障保护
D．剩余电流保护

答案

参考答案：D

解析： 《照明设计手册》第21章第2节或《复习指导书(供配电)》13.4.5。

判断题

静压法油罐计量系统是利用液位测量方法测量油罐内油品质量的。
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填空题

You want to know what the safest place for children 77．______
is in the car The experts say the back seat is the safest for 78．______
them. The back seat is farthest away off the force of a head- 79．______
on collision(迎头撞击), which can lead serious injuries. 80．______
If your child is below 8 and weighs no more than 85 81．______
pounds, it is necessarily to fit your car with a safety seat. 82．______
Moreover, the safety seat must be held in place of on the83．______
car’s back seat. If your child do need your attention while 84．______
you driving, don’t look back with only one hand on the 85．______
wheel. You’d better stop the car. 86．______
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