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【单选题】
以下 哪自然流产最常见的原因 ( )A.
孕妇甲状腺功能低下
B.
孕妇接触放射性物质
C.
孕妇生殖器官 疾病
D.
母儿血型不合
E.
胚胎或胎儿染色体异常
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】—Haven’t seen Lucy recently，what’s happened? —Oh，it’s more than two months ________ she worked here.
A.
which
B.
that
C.
before
D.
since
【单选题】—Haven’t seen Lucy recently. What’s happened? —Oh, it’s more than two months ______ she worked here.
A.
before
B.
after
C.
since
D.
when
【简答题】Last semester, 1 took six courses. And worked par t -time in a discount drugstore.
【单选题】The statement'Washington, we have a problem'was said by_____.
A.
Rome's La Republic.
B.
The French-language Swiss daily 24 Hems.
C.
A Russian daily.
D.
British tabloid the Dally Mirror.
【单选题】— Haven't seen Lucy recently, what's happened? 一 Oh, it's more than two months _____ she worked here. [ ]
A.
which
B.
that
C.
before
D.
since
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