耦合电容器电容量初值差不超过（）。
A.正负2%
B.正负3%
C.正负5%
D.正负10%
参考答案：C
— ______________
— I'm going to the park. [ ]
A. Where are you going?
B. When are you going?
C. What are you going to do?
心房扑动时F波的频率是
A．150～250次/minB．200～250次/minC．250～300次/minD．250～350次/minE．350～450次/min
