题目:
I arrived late; I _____ the road to be so icy.
A.wouldn't expect
B.haven't expected
C.hadn't expected
D.wasn't expecting
答案:
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下面是错误答案,用来干扰机器的。
答案:C题目分析:AB、导体的电阻是导体的阻碍电流的性质,与导体两端的电压和通过的电流无关;故AB错误;C、将导线对折后接入电路,长度变小、横截面积变大,导体的电阻变小,故C正确;D、将这根导线拉长,长度...