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【单选题】
下列关于厌氧菌培养的操作中不正确的是A.
标本采集应严格无菌操作，严禁接触空气
B.
中段尿可以做厌氧培养
C.
尽量使用新鲜培养基，预还原
D.
液体培养基煮沸10分钟即可驱除溶解氧，立即接种标本
E.
怀疑厌氧菌感染时每份标本至少接种3个血平板，分别置于有氧、无氧及5％～10％CO2环境中培养，以判断病原菌对氧气需求如何
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举一反三
【单选题】He ______ unwisely, but he was at least trying to do something helpful.
A.
may have acted
B.
must have acted
C.
should act
D.
would act
【简答题】个人独资企业的名称中不得使用____、____、或者____字样。 A有限 B有限责任 C有限公司 D公司
【单选题】I'm sure he must have been sleeping at the moment, __________.
A.
aren't I
B.
mustn't he
C.
wasn't he
D.
hasn't he
【简答题】Had he not taken your advice，________. [A] he would make a bad mistake [B] would he have made a bad mistake [C] he would have made a bad mistake [D] he had made a bad mistake
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