题目

为问句选择恰当的答句May I have a look? A: Cool!Nice to meet you． B: Sure, here you are.Look! I have a monkey. C: Fine, thanks.It's lovely.D: Nice to meet you, too.How are you? E: Thank you. 答案：【1】B【2】D【3】A【4】E【5】C某微粒核外电子的数目分别为：K层2个，L层8个，M 层8个，该微粒一定是A．氢原子 B．钾离子 C．氯离子 D．无法确定