According to the author, the introduction of computer is a

According to the author, the introduction of computer is a revolution mainly in

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阻碍互惠交换实现的主要障碍包括(  )。

阻碍互惠交换实现的主要障碍包括(  )。A.体制障碍 B.市场缺陷 C.诚信障碍 D.经济滞后 E.信息障碍

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One fundamental flaw of e-mail phones is that people cannot

One fundamental flaw of e-mail phones is that people cannot use it toA.receive

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Some teenagers harbor a generalized resentment against soci

Some teenagers harbor a generalized resentment against society, which _________

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Large companies promote secretaries more.often than small c

Large companies promote secretaries more.often than small companies do.A.Right

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