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搜题
【单选题】
细胞在未受刺激时所具有稳定的细胞内外电位差的膜电位是A.
后电位
B.
局部电位
C.
阈电位
D.
动作电位
E.
静息电位
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】下列关于APU的滑油系统说法正确的是：（）.
A.
APU的滑油是通过燃油冷却的
B.
APU发电机通过自己的压力泵和回油泵进行润滑冷却
C.
主电门接通时，则滑油加热器不工作
D.
滑由稀释活门仅在APU起动过程中起作用
【单选题】How did the boy respond when Jason grabbed him?
A.
The boy wouldn't let him rescue.
B.
The boy was terrified and struggling in the water.
C.
The boy didn't respond because he was already dead.
D.
The boy became unconscious as he sank below the surface.
【单选题】The boy asked his father .
A.
where it happens
B.
when did it happen
C.
what did it happen
D.
how it happened
【简答题】How did the author behave as a boy in love?
【单选题】How did the boy respond when the author grabbed him?
A.
The boy popped back up, eyes wide with terror, pawing and twisting against him.
B.
The boy completely followed his instructions , swimming with him.
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