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【单选题】
具有“全或无”特征的电反应是A.
动作电位
B.
静息电位
C.
终板电位
D.
感受器电位
E.
突触后电位
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反馈参考答案：
举一反三
【单选题】It is NOT mentioned but implied (暗示) that______.
A.
some kinds of electronic equipment are bad for our personal lives
B.
watching too much TV hurts children's eyes
C.
some kinds of electronic equipment cause social problems
D.
television has bad effects on both grown-ups and children
【单选题】Some kinds of animals can change their colour with _______.
A.
conditions
B.
environment
C.
surroundings
D.
situation
【单选题】People _________ some kinds of medicine should not give blood.
A.
getting
B.
having
C.
eating
D.
taking
【简答题】应变式传感器一般是由( )和 ( ) 两大部分组成。
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