A.embryo B.oocyte C.blastomere D.blastocyst E.oocyte-cumuluscomplex

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问题 A.embryo
B.oocyte
C.blastomere
D.blastocyst
E.oocyte-cumuluscomplex

选项 A、 
B、 
C、 
D、 
E、 

答案B

解析
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