I have to speak to my grandpa loudly because something is wrong with his .
下列关于分子间作用力和分子热运动的说法正确的是( )
把两根同种材料做成的电阻丝,分别接在两个电路中,甲电阻丝长为l,直径为d,乙电阻丝长为2l,直径为2d,要使两电阻丝消耗的功率相等,加在两电阻丝上的电压应满足( )