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可能导致艾滋病病毒(HIV)传播的行为是与艾滋病患者或HIV感染.....
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He was accepted as a(n)______ member of staff af.....
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队列研究中,队列的成员必须A、患同种疾病B、经历过同样的时.....
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In certain area, during certain period, the development of communication could ______ the ..
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鼠类可以作为传染源引起()。A、发疽病B、疟疾C、黄热病D、.....
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Four years of service entitle Jack ______ a pension.A.onB.inC.atD.to..
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