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dfhgftdhyf()

A. Because the news might be a rumor.
Because the news was about another mans death.
C. Because Michael Jackson could not die.
D. Because Michael Jackson held a concert the day before

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fgjhjjkj()

A. She has already heard about the news.
B. She didnt hear about the concert.
C. She loves music very much.
D. She prefers staying at school

tjsyklyaet()

A. To write his own poems.
B. To form his own band.
C. To compose his new song.tlp
D. To take part in a singing contest

为了把电压表的测量范围扩大100倍,倍率器的电阻应是内阻的倍()

C. 99
D. 100

变压器运行时其内部存在铁损耗和铜损耗

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