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【单选题】
在中性点直接接地电网中的剩余电流保护器后面的电网零线不准再(),以免引起保护器误动作A.
重复接地
B.
直接接地
C.
保护接零
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反馈参考答案：
举一反三
【简答题】在实际设备更新方案必选时,应遵循的原则包括( )。
【单选题】While we were listening to the speech attentively, a voice ________ to announce the result of the election
A.
broke in
B.
broke down
C.
broke up
D.
broke off
【单选题】“中国青年旅行社”的海南双飞六日游旅游项目在暑假定价为1050元/人,春节期间定价为1850元/人,这种定价方法属于( )。
A.
现金折扣
B.
数量折扣
C.
功能折扣
D.
季节折扣
【单选题】While we were listening to the speech attentively, a voice _____ to announce the result of the election.
A.
broke in
B.
broke up
C.
broke off
D.
broke down
【单选题】We _______ our hands while they were singing on the stage. [ ]
A.
clapped
B.
have clapped
C.
were clapping
D.
are clapping
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