题目：
— Were you alone at home yesterday?
— Yes, my children as well as my wife _____ invited to the party. [ ]
A. was
B. were
C. has been
D. have been
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：共有个核外电子，则R的质子数是x－3×8－n。又因为质子数＋中子数＝质量数，所以R的中子数是A－x＋n＋24，答案选A。点评：该题是高考中的常见题型，属于基础性试题的考查。重点考查学生对原子组...
