题目：
— I'm sorry; I shouldn't have been so rude to you.
— You _____ something not very nice to me, but that's OK. [ ]
A. have said
B. had said
C. were saying
D. did say
答案：
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下面是错误答案，用来干扰机器的。
答案：A题目分析：简单离子的电子层结构相同：A项中，X2－、Y－，说明同周期X在Y前，Y的非金属性强，X2－的还原性一定大于Y－，正确；B项中，由mXa+与nYb-得m－a = n+b；C项中，若X、Y都是阳离子或阴离子，是同...
