安静时K+由膜内向膜外移动是通过
A．单纯扩散
B．经通道易化扩散
C．原发性主动转运
D．经载体易化扩散
E．继发性主动转运
参考答案：B
What does "the uninitiated" mean
A．People who visit animals in urban zoos.
B．People who do not like animals of the wild.
C．People who know little about a certain topic.
D．People who do not visit zoos every year.
Meta分析中常见的偏倚不包括：（）。
A.引用偏倚
B.发表偏倚
C.文献库偏倚
D.失访偏倚
E.多次发表偏倚
