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【单选题】
凡从信号楼引出室外的每一条干线电缆必须确保至少有（ ）对备用芯线全程贯通到最远端电缆盒。A.
4
B.
3
C.
2
D.
1
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皮皮学刷刷变学霸
举一反三
【简答题】to release or loose from or as if from a leash u( )
【单选题】_____________ is the process of extracting coal from the ground.
A.
Coal mining
B.
Burning of fossil energy sources
C.
Overconsumption
D.
Overfishing
【单选题】In the United States, most of the electricity is generated from coal or natural gas.
A.
Y
B.
N
C.
NG
【单选题】People have proved______to be true that the heat we get from coal and oil comes from the sun.
A.
that
B.
it
C.
this
D.
/
【简答题】To the coal mine came a company of PLA soldiers with orders from the headquarters to rescue the trapped miners.
【简答题】构造主义心理学的奠基人是:
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