题目

(pass)his driving test, Sam was able to buy his first car. 答案：【1】Having passed如图所示，将一个电流表G和另一个电阻连接可以改装成伏特表或安培表，则甲图对应的是_____________表，要使它的量程加大，应使R1_____________。 A．电压表，增大B．安培表，增大C．安培表，减小D．电压表，减小