A. ns2np2.
B. ns1.
C. ns2np1.
D. ns2np4.
E. ns2np3.
F. ns2.
The answer could be more than one choice.
收錄日期: 2021-05-02 20:40:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130429183717AAWHTW9