More than ____ of the   classmates in my class ____ fond of pop music.   [ ]

A. two-third; is                

B. two-thirds; is      

C. second-third ; are                      

D. two-thirds ; are

脉码调制器、电子线路和（）组成双侧向的井下测量系统。

A、电极系

B、极板

C、推靠

D、线圈系