If I drive in this city myself, I'll probably get lost as I haven't got ____ very good sense of ____ direction.[ ]

A. a; 不填

B. the; 不填

C. a; the

D. the; a

所有输入、输出电压监测配线都从电源屏引出，因电源电压较高，故均经过熔断器和高阻降压后再接入（）模块。