问题
单项选择题
神经细胞动作电位的复极相，K+外流至膜外又暂时阻碍K+进一步外流，结果形成
A．锋电位
B．阈电位
C．负后电位
D．局部电位
E．正后电位
答案
参考答案：C
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神经细胞动作电位的复极相，K+外流至膜外又暂时阻碍K+进一步外流，结果形成
A．锋电位
B．阈电位
C．负后电位
D．局部电位
E．正后电位
参考答案：C
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| Peter, David, Diana and Bonnie are four good friends. They are in the same class. But they like different (1)___________. Peter (2)___________ tomatoes, but (3)___________ doesn't. Peter and Diana don't like (4)___________. David and Diana like (5)___________, but Bonnie (6)___________. (7)___________ and (8)___________ like strawberries. But sometimes they have the same taste. All of them like (9)___________. Neither of them like (10)___________. |