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安全传输电子邮件通常采用()系统。A.FTTPB.PGPC.SETD.SSL
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A.takeB.giveC.setD.turn
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【C12】A.could have setB.should have setC.ought to have setD.need to have set
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【C4】A.decidedB.madeC.setD.set up
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【C5】A.focusedB.directedC.setD.stated
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【C8】A.shareB.reserveC.setD.possess
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【C3】A.successionB.numberC.setD.series