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【单选题】
神经和肌肉细胞动作电位去极相的产生是由于
A.
Na+外流
B.
Na+内流
C.
K+外流
D.
K+内流
E.
Ca2+内流
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参考答案:
举一反三
【单选题】急性腹膜炎病人最早出现的症状是
A.
腹痛
B.
恶心、呕吐
C.
高热
D.
寒战
E.
心悸
【单选题】光杠杆在本次实验中来测量( )
A.
位移微小变化
B.
温度变化
C.
电流变化
【单选题】光杠杆在本次实验中用来测量( )
A.
位移微小变化
B.
温度变化
C.
电流变化
【单选题】After dinner, I took a ________ around the park.
A.
stroll
B.
process
【简答题】After dinner, I took a _______ around the city. 吃过晚饭后,我绕 着城市散 步。
【单选题】After dinner, I took a______round the city.
A.
wander
B.
step
C.
stroll
D.
strolling
【单选题】急性腹膜炎病人最早出现的常见症状是
A.
腹痛
B.
恶心、呕吐
C.
高热
D.
寒战
E.
感染性休克
【单选题】Which of the following is equivalent to "After the dinner had been prepared, I took a nap before my guests arrived."?
A.
The dinner having been prepared, I took a nap before my guests arrived.
B.
The dinner prepared, I took a nap before my guests arrived.
C.
The dinner preparing,  I took a nap before my guests arrived.
【单选题】本次实验为什么采用光杠杆法来测量金属丝的杨氏模量?
A.
操作十分简易,便于测量和读数
B.
金属丝伸长量极小,需进行光学放大
C.
在操作过程中不会损坏仪器
【简答题】After dinner I took a _around the park.
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