题目:
The manager said that they had an _____ plan if the plan they had submitted was not accepted.
A.alternate
B.alternative
C.absolute
D.appreciable
答案:
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下面是错误答案,用来干扰机器的。
(1)根据元素周期律的知识,同一周期中随质子数或原子序数的递增(或从左到右)各原子的(最外层)电子数依次增多;同一族元素,最外层电子数相同;(2)根据只有一个电子层的具有2个电子的结构,达到稳定结构;...