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【多选题】
医疗器械经营企业不得经营 ( )A.
未经注册或备案的医疗器械
B.
无合格证明的医疗器械
C.
过期、失效的医疗器械
D.
淘汰的医疗器械
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反馈参考答案：
举一反三
【单选题】对于HIV感染,下列哪项检无意义?
A.
测病毒逆转录酶活性
B.
测HIV抗原p24
C.
测病毒包膜糖蛋白
D.
用核酸杂交法测病毒DNA
E.
测病人血清中相应抗体
【单选题】"Harry was compelled to resign and to come down to London, where he set up as an army coach." The relative clause in the sentence serves to___.
A.
supply additional information about London
B.
describe the antecedent "London"
C.
narrate a sequential action taken by Harry
D.
put restrictions on the identity of Harry
【单选题】“Harry was compelled to resign and to come down to London, where he set up as an army coach.” The relative clause in the sentence serves to ( ).
A.
supply additional information about London
B.
describe the antecedent “London”
C.
put restrictions on the identity of Harry
D.
narrate a sequential action taken by Harry
【单选题】"Harry was compelled to resign and to come down to London, where he set up as an army coach" The relative clause in the sentence serves to .
A.
supply additional information about London
B.
describe the antecedent "London"
C.
put restriction on the identity of Harry
D.
narrate a sequential action taken by Harry
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