隐匿性传导可发生于()
A.房室交界区
B.窦房交界区
C.左、右束支
D.浦肯耶纤维
E.房室旁路
参考答案:A, B, C, D, E
— Would you like some fish?
— [ ]
A. Yes, I would.
B. No, I wouldn't.
C. No, thank you.
在使用pH试纸测定某溶液的pH时,若事先用蒸馏水把试纸润湿后再测pH,测实际测得值与真实值比较( )
A.变大
B.变小
C.不变
D.无法判断