电阻是导体对电流的阻碍作用所以 A.有电流通过导体就有电阻没有电流通过导体就没有电阻 B.通过导体的电流强度逐渐增大则导体的电阻也 Template




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tomski电阻是导体对电流的阻碍作用所以 a.有电流通过导体就有电阻没有电流通过导体就没有电阻 b.通过导体的电流强度逐渐增大则导体的电阻也 coloring