A:附睾和输精管
B:前列腺和附睾
C:输精管和阴囊
D:阴囊和输精管
进入青春期后,生理不断成熟,主要表现在( )①性机能发育成熟 ②身体外形急剧变化 ③体内机能迅速健全
已知集合M={x|x2﹣2x﹣3≤0,x∈R},N={x||x|<2,x∈R},则M∩N等于( )
— Must I be in hospital for a week, Doctor?
— No, you . You can go back home tomorrow.