A:busiest
B:busier
C:nearer
D:nearest
A是____,B是____,C是____,D是____.
---- Excuse me, could you please tell me the way to the nearest hospital?
---- I'm sorry, _I am new here. You can ask the policeman over there.
实验室购买了一批规格为“2.5V 0.75W”的小灯泡,小明利用其中一只灯泡做测量小灯泡电功率的实验.
如图是汽车、摩托车油量表(实际上就是电流表)原理示意图,R′是定值电阻,R是滑动变阻器,则( )