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【简答题】
同一个对称三相负载接在同一电网中,作三角形联结时线电流是星形联结时的___倍。
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【单选题】Intelligent use of the muscles means that ________．
A.
one always knows what his muscles are doing
B.
one performs simple actions whithout working
C.
one’s muscles are used only to the extent necessary for each action they perform
D.
one improves muscular action consciously
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【简答题】The obligation to prove that one’s actions are legitimate is often called ( ) of proof.
【简答题】Apparently, we are safe neither at home nor in the business office. We use water in both places, but the above-mentioned research shows that chemicals added to our local water supply to kill harmfu...
【单选题】In the last paragraph the author mainly wants to express .
A.
one must be brave to be honest
B.
it’s difficult to be honest when others are not
C.
one should be honest when making a deposit
D.
honesty in one’s actions can help him in the future
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