Emma is very busy in the moming. She gets up at half past five. After brushing her teeth, she ____. She usually does sports for thirty minutes. Next, she helps to make breakfast. At half past six, she eats breakfast. For breakfast Emma usually has bread and milk. She____ eats hamburgers. Hamburgers are unhealthy. Emma needs a healthy ____. After breakfast she____ her room. Then she goes to school. Emma usually____to school. She says walking is good for her.

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                                                                                                       治国犹栽树
        唐太宗谓侍臣①曰：“往昔初平京师②，宫中美女珍玩，无院不满。炀帝③意犹不足，征求不已，兼东征西讨，穷兵黩武，百姓不堪，遂致灭亡，此皆朕所目见。故夙夜孜孜④，惟欲清净，使天下无事。遂得徭役不兴，年谷丰稔⑤，百姓安乐。夫治国犹栽树，本根不摇，则枝叶茂盛。君能清净，百姓何得不安乐乎？”
                                                                                                                                                   （节选自《贞观政要》）
【注】①侍臣：周围的大臣。     ②京师：京城。此指隋朝京城大兴（今陕西西安市）。 ③炀帝：指隋朝未代皇帝杨广。④孜孜：勤恳的样子。⑤稔：rěn,丰收。

人类社会总是不断进步发展的，但在发展过程中又充满着矛盾和斗争，即使阳光普照，鲜花满地，也会有阴暗和毒草。作为中学生，我们（   ）       

在“测量滑轮组的机械效率”的实验中，某组同学用同样的滑轮安装了如图甲、乙所示的滑轮组，实验测得的数据如表所示．