题目内容

临床试验中的试验对象为男女人数必须相同。()

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Congress has decreed that the present law_____.

A. be maintained
B. were maintained
C. were to be maintained
D. should maintain

Which of the following reflexive pronouns(反身代词)is used as an appositive(同位语)?

A. He drank himself under the table.
B. I have nothing to say for myself.
C. The other two are Mr Stein and myself.
D. She herself is the cause of the difficulty.

常用存活率反映其疗效的疾病为高血压。()

信用风险是指在支付过程中,因一方拒绝或无法清偿债务时而使另一方或其他当事者蒙受损失。()

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