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问题 单项选择题

兴奋性突触后电位的电变化是

A．极化

B．去极化

C．超极化

D．反极化

E．复极化

答案

参考答案：B

解析：兴奋性突触后电位是突触传递中，突触后膜产生的局部去极化电位。

选择题

O2不能表示（　　）

A．氧气

B．一个氧分子

C．每个氧分子有两个氧原子构成

D．氧原子
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单项选择题

A project team is in the design stage of a new mountain bike prototype. The team is in the process of identifying which type of frame and material will provide high performance at a low cost. Which of the following is the MOST likely technique used to determine these variables

A．Benefit/cost analysi

B．Ishikawa diagra

C．Design of experiment

D．System flow char
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