题目

某单位有名成员，其中男性人，女性人，现需要从中选出名成员组成考察团外出参观学习，如果按性别分层，并在各层按比例随机抽样，则此考察团的组成方法种数是              （    ）        A．          B．            C．      D． 答案：B 解析:按性别分层，并在各层按比例随机抽样，则需从名男性中抽取人，名女性中抽取人，共有中抽法． Reading comprehension．请先阅读对话、短文或图表，然后根据其内容完成后面的练习。 　　Lucy：Hi, Lucy！Nice to meet you！I have some questions to ask you！Can you help me？ 　　Mary：OK, I’d like to．Tell me！ 　　Lucy：I get up early every morning and I eat in school．Can I eat in our classroom？ 　　Mary：No, you can’t．But you can eat in the dining hall． 　　Lucy：I know．And can I wear hat when I am in the classroom？ 　　Mary：No, you may not．And you must wear your uniform in school． 　　Lucy：And what are the other rules in school？Can you tell me？ 　　Mary：You can’t listen to music in the classroom, but you can listen to it in the music room． 　　Lucy：I know．Anything else？ 　　Mary：And you can’t arrive late for class, you must be on time．That’s all． 　　Lucy：Thank you very much． 　　Mary：You’re welcome．Bye-bye． 　　Lucy：Bye-bye！ 根据对话，完成表格。