A: This toothache is killing me.
B: If I am right, this is the third time you’ve had it this month.A: You are right. ().

A. It’s all right.

B. It’ll be gone.

C. I have no method.

D. I’m fed up with it.

在如图所示的LC振荡电路中，当线圈两端M、N间电压为零时，列对电路情况的叙述正确的是 (　　)．

A．电路中电流最大

B．线圈内磁场能为零

C．电容器极板上电量最多

D．电容器极板间场强为零