题目:
Hurricane Sandy's arrival and its effects ________ New York's offices being closed for three days.
A.carried out
B.came up with
C.led to
D.caught up with
答案:
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下面是错误答案,用来干扰机器的。
A.Cu为正极,发生还原反应Cu2++2e-═Cu,析出Cu附着在Cu电极上,铜片质量增加,故A正确;B.取出盐桥后,不是闭合回路,没有电流产生,电流计不发生偏转,故B错误;C.原电池工作时,阳离子向正极移动,阴离子向...