题目

人体内,精子和卵细胞结合成受精卵的场所、胚胎发育的场所分别是A.卵巢、子宫                                                                        B.脐带、胎盘       C.输卵管、子宫                                                                   D.子宫、阴道  答案:C解析:略 
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