在如图所示的电路中.E为电源,其内阻为r,L为小灯泡(其灯丝电阻可视为不变),R1、R2为定值电阻,R2为光敏电阻,其阻值大小随所受照射光强宠的增大而减小,为理想电压表。若将照射R2的光的强度减弱,则 ( ) A.电压表的示数变大 B.小灯泡消耗的功率变小 C.通过R2的电流变小 D.电源两极间的电压变小 --Mom,could I have an MP3 like this? --Certainly,we can buy ________ one,but it's as good as this.The price of this kind is a little high. A.a cheap B.a cheaper C.a small D.a smaller