问题 单项选择题 A1/A2型题

男性精液检查,少精症是指精液密度()

A.≤2000万/ml

B.≤3000万/ml

C.≤4000万/ml

D.≤6000万/ml

E.≤8000万/ml

答案

参考答案:A

根据图片,说一说它们在中国的历史:

(1)

(2)

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

单项选择题