If we sit near _____ front of the bus, we'll have _____ better view. [ ]

A. 不填; the

B. 不填; a

C. the; a

D. the; the

齐纳安全栅的汇流条或导轨应作（）接地。

A、信号回路

B、本安

C、屏蔽

D、保护