导体两端的电压为8V时,通过它的电流为0.5A,则该导体的电阻为______Ω,当该导体两端的电压为0V时,则导体的电阻为________Ω. 答案:【答案】 16 16【解析】由I=可得,这导体的电阻:R= ==16Ω;因电阻是导体本身的一种性质,与导体两端的电压和通过的电流无关,所以,当导体两端的电压为0V时,导体的电阻仍为16Ω不变。27、---I saw no more than one motor-car in that shop.
Will you go and buy ______?
---No, I’d rather find ______ in other shops.
A. one;
one B. it;
it C. one;
it D. it; one