问题
单项选择题 A1/A2型题
正常人精子浓度为（）
A.（10～50）×109/L
B.（50～100）×109/L
C.（60～120）×109/L
D.（60～150）×109/L
E.（100～150）×109/L
答案
参考答案：B
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正常人精子浓度为（）
A.（10～50）×109/L
B.（50～100）×109/L
C.（60～120）×109/L
D.（60～150）×109/L
E.（100～150）×109/L
参考答案：B
| 完形填空。 | |||
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