搜题请搜索小程序“爱下问搜题”
问题 选择题

下列叙述正确的是

A．电镀时应把镀件置于电解槽的阳极

B．电解稀氢氧化钠溶液，要消耗OH－，故溶液pH减小

C．目前已经研制成功铝—空气电池，铝为电池的负极

D．原电池的负极和电解池的阳极所发生的反应同属还原反应

答案

答案：C

选择题
圆的半径扩大一倍，则它的内接正六边形的边长和半径的比(   )
A.缩小了一倍
B.扩大了一倍
C.扩大了两倍
D.没有扩大也没有缩小
查看答案
选择题

Tom and Jack are both very clever. ________, Tom is _______ Jack.

A．All in all, as a clever boy as

B．In other words, as clever a boy as

C．That is to say, as a clever boy as

D．In word, as clever a boy as
查看答案