题目内容

与上层建筑相对应的经济基础是指( )。

A. 社会发展一定阶段上占主导地位的生产关系的总和
B. 劳动资料和劳动对象的总和
C. 社会财力和物力的总和
D. 人们社会关系的总和

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在几个社会制度中发生作用的经济规律是( )。

A. 剩余价值规律
B. 价值规律
C. 按劳分配规律
D. 生产关系一定要适合生产力发展的规律

Isolated equipment is reconnected and work site is made safe in accordance with established safety procedures. You must check the resistance between the equipment metal casing and a known earth is not grater then_______Ω. (Australian Standard)

A. 0
B. 0.1
C. 0.5
D. 1

Earth connection is vital to electrical safety. When you disconnecte an fault equiment, you must disconnect the earth pin_.Isolated equipment is reconnected and work site is made safe in accordance with established safety procedures. The earth pin must be connected___.

Fuses or circuit breakers are used to protect circuits/wiring against __ and/or