电力系统发生三相短路时,短路电流( ) A、由负荷流到短路点; B、由电源流到短路点; C、由电源流到负荷; D 不清楚
A.
B.
C.
D.
D
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【单选题】Passage 2 With only about 1,000 pandas left in the world,China is desperately trying to clone the animal and save the endangered species. That's a move similar to what a Texas A&M University researche...
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