皮皮学，免费搜题
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【单选题】
确证的人类致癌物必须有A.
人类流行病学及动物致癌实验方面充分的证据
B.
经动物实验及流行病学调查研究，并有一定的线索
C.
充分流行病学调查研究的结果
D.
已建立了动物模型
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反馈参考答案：
举一反三
【简答题】The doctor saw at the first sight that the lady (suffer) ________ from heart trouble.
【简答题】'I saw the doctor taking off his mask and laying a hand on her shoulder. 'implies that the doctor took the woman as the man's ______.
【单选题】The doctor ____ my eyes carefully and told me that there was nothing serious with them. [ ]
A.
saw
B.
examined
C.
checked
D.
controlled
【单选题】标志着新警察走向独立与成熟的是第( )次警务革命,主要内容是( )。
A.
第一次，罗伯特 比尔建警
B.
第二次，警察的专业化运动
C.
第三次，警察的现代化运动
D.
第四次，社区警务运动
【单选题】After the patients went into the office,＿＿working.
A.
only a doctor did they see
B.
only a doctor saw they
C.
only a doctor they saw
D.
only a doctor had they seen
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