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【单选题】
C3转化酶是( )A.
C4b2b
B.
C4b2a
C.
C4b2b3b
D.
C
E.
C3b
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参考解析：
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举一反三
【单选题】以下性教育方式中错误的是:
A.
注意性卫生习惯的培养
B.
儿童出现夹腿行为时应当恰当干预
C.
性不良行为的干预一定要注意儿童的心理健康
D.
儿童提出性相关问题时应该直接拒绝回答
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A.
must have returned
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