题目

热敏电阻包括正温度系数电阻器(PTC)和负温度系数电阻器(NTC)。正温度系数电阻器(PTC)在温度升高时电阻值增大,负温度系数电阻器(NTC)在温度升高时电阻值减小,热敏电阻的这种特性,常常应用在控制电路中。某实验小组选用下列器材探究通过热敏电阻Rx(常温下阻值约为10.0 Ω)的电流随其两端电压变化的特点。A.电流表A(量程0.6 A,内阻约0.3 Ω)B.电压表V(量程15.0 V,内阻约10 kΩ)C.滑动变阻器R(最大阻值为10 Ω)D.滑动变阻器R′(最大The flat rent is expensive, I’ve got about half the space I had at home but I am paying ________ hereA.at twice muchB.as much twiceC.much as twiceD.twice as much
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