下面几种说法中正确的是  [ ]

A．比较铜丝和铁丝电阻的大小就看它俩谁长，长的电阻就大  

B．比较铜丝和铁丝的电阻就看谁的横截面积大，横截面积大的电阻就小  

C．比较铜丝和铁丝的电阻就看谁的质量大，质量大的电阻大  

D．粗细和长度都相同、温度也相同的铜丝与铁丝相比较，铁丝的电阻大

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A．as soon as possible

B．as soon as possibly

C．as soon as can

D．as quick as possible