单项选择题 A．0期除极速度快、幅度高 B．4期电位不稳定C．二者都是 D．二者都不是心室肌细胞动作电位的特征是A． B． C． D．

单项选择题 M: French or Italian restaurant? I like both, but both are too good to make a choice.W: You’d better make a decision because I’m not going to wait for you to make up your mind.Q: What does the woman suggest the man do?（）

单项选择题 A．突眼性甲状腺肿 B．桥本甲状腺肿C．结节性甲状腺肿 D．甲状腺高功能腺瘤E．继发性甲状腺功能亢进向胸骨后生长延伸的常是A． B． C． D． E．