常见的电阻藕合有哪些？
参考答案：
（1）公共地线阻抗产生的藕合干扰。（2）公共电源内阻产生的藕合干扰。（3）公共线路阻抗形成的藕合干扰。
70. I know it is difficult __________ him to talk like the lecturer, but I think he should grasp every chance .
A．of
B．for
C．with
D．Over
A．p-＞next
B．p
C．s
D．s-＞next
