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【单选题】
下列关于导体电阻的说法,正确的是( )。
A.
一根金属丝被均匀拉长后，它的电阻将变大
B.
材料不同的导体，电阻一定不同
C.
同种材料制成的长短相同的两条导线，粗导线的电阻较大
D.
粗细相同的两条导线，长导线的电阻较大
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查看完整题目与答案