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【简答题】
导线中的负荷电流不大于(),线路末端的电压偏移不大于额定电压的()%,单相线路的零线截面与相截面(),三相四线制的工作零线和保护零线截面不小于相截面的()。
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举一反三
【单选题】—Robert is indeed a wise man. —Oh, yes. How often I have regretted his advice! [ ]
A.
to take
B.
taking
C.
not to take
D.
not taking
【简答题】( ) is the only food of the young mammal during the first period of its life.
【单选题】— Tom is indeed a wise man. — Oh ,yes. How often I have regretted his advice! [ ]
A.
to take
B.
taking
C.
not to take
D.
not taking
【单选题】What‘s the difference of the tower during its first and second construction? 查看材料
A.
At the first time， it leaned northwards but southwards the second time.
B.
At the first time， it leaned southwards but northwards the second time.
C.
At the first time， it leaned westwards but eastwards the second time.
D.
At the first time， it leaned eastwards but westwards the second time.
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