题目内容

下列哪项是异位妊娠最主要的原因

A. 输卵管发育不良
B. 子宫内膜异位症
C. 放置宫内节育器
D. 输卵管炎
E. 精神因素

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Why not buy a second-hand car first if you don't have enough money for a new one?

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异位妊娠简单可靠的诊断方法是

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