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雷锋日记一则

    1961年10月15日   晴

    今天是星期天，我没有外出，给班里的同志洗了五床被褥（rǔ）单，帮高奎（kuí）云战友补了一床被子，协助炊事班洗了六百多斤菜，打扫了室内卫生，还做了一些零碎的事……总的来说，今天尽到了一个勤务员应尽的义务，虽然累一点，却感到很快活。班里的同志感到很奇怪，不知道是谁把被褥单都洗得干干净净的。高奎云惊奇地说：“谁把我的被子换走了_____”他还不知道是我给他补的呢！我觉得当一名无名英雄是最光荣的。今后还应该多做一些日常的_____细小的_____平凡的工作_____少说漂亮话_____

根据短文内容，选择正确答案。
Hello, friends!
    My name is Zhou Dan. I'm a Chinese girl. I'm twelve. I'm from Zhengzhou, China. Do you know Zhengzhou? It's in the middle of China. I'm in No. 8 Middle School. There are about 900 students and 50 teachers in our school. It is a good school in Zhengzhou: I'm in Class 2 Grade 7. There are 49 students in our class: 29 girls and 20 boys. My English teacher is Miss Zhao Dan. Our names are almost the same, right? She is nice to me. We're good friends. I like English, and I like music, too. I want to find a pen-friend. Please write to me.
                                                              Yours,
                                                            Zhou Dan

下列分散系中，分散质微粒半径最小的是（   ）

有位学者说：“中国学术思想最灿烂的时期是秦以前，政治社会最理想安定时期莫过于汉唐。”秦以前“学术思想最灿烂”是指（    ）

The plant       small．It        a yellow flower．