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阅读《你是我最笨的学生》，完成小题。

你是我最笨的学生

      ①毕业后我留在北京教书，父亲闲着寂寞，便打电话托我买台电脑，他要和我视频聊天。我笑他，都50岁的人了，对电脑一窍不通，可得专门请个老师才行。父亲说，几年前你是我的学生，现在让老爸做你的学生好不好？我说那老爸你得认真学，我可没时间手把手教你。父亲呵呵笑着说，那是当然，我得争取做闺女班里最聪明的学生，就像你给爸爸争了光一样。

      ②以后的每个周末晚上，我都被老爸硬拽到电脑前，起初是打长途教他申请到了QQ号，然后是终于让他学会了使用视频。到了这一步，父亲就有些懈怠，每天我扯着嗓子教他如何搜索资料、如何盲打、如何储存东西，我觉得自己所费的劲，几乎比教班级里最笨的学生还要多，但父亲的电脑知识，却始终停在开着视频，对着话筒和我呵呵说笑的程度。

      ③老爸似乎对自己的愚笨没有丝毫的察觉，他胖胖的脸在视频的镜头里，始终是心满意足地笑着。我说老爸你要实践啊，只是每个周末听我讲，之后一个星期就再也不摸电脑，那怎么行？父亲照例在视频里笑开了花，说，老爸其实很聪明的，姑娘你只要有耐心，老爸肯定会进步飞速。我看着每一个指令需要我重复N遍后才会点头的一脸茫然的父亲，突然有点泄气，想究竟是我这个老师不合格，还是父亲真得太笨，对这样先进的知识，完全没有学会的细胞？

      ④父亲所谓的进步，也只能和我打字聊天为止。此后不管我怎么地努力，他都停在原地，再不会前进半步。隔壁的同事每每听到我声嘶力竭地在房间里吼，就知道准是又在教父亲上网了。有一天，她无意中笑着说，对待笨的学生，冷落有时侯比耳提面命的教导更管用的，为什么不试试呢？我欣然采纳。

      ⑤老爸对我的这项政策显然有些不适应，没过一星期，他就撑不下去了，说姑娘你还是手把手的教教老爸吧，我这么一大把年纪，比不上你们年轻人。后来见我无动于衷，终于急了，竟然和我开始冷战。我打电话给母亲，让她转告父亲，像他这么笨的学生，我还是第一次碰到，都三个月了，打字还像牛车的速度，照这样下去，我岂不是教他一辈子也教不会？母亲听完我的抱怨，叹口气，小声道：孩子，其实你爸哪有那样笨呀，他只是想多听你说说话罢了，他要是什么都学会了，还怎么能认你做老师？你每次在视频上不耐烦地朝他囔，他都不急不躁，还笑着听你讲课，如沐春风。他花几千块钱，只是买了个能看见你的模样的电话而已，他这么大年纪了，学会上网又能做什么呢？能和你面对面地聊天，对他来说，就已经是精通电脑了呀！

      ⑥最笨的那个学生原来是我，笨到和父亲面对面，看见他温柔地冲我喋喋不休的笑啊笑，都不知道，他心里想着的，只是看看千里之外的我，是不是还好好的，是不是还像他想念我一样，将他放在心里最温暖的地方。

A survey of the opinions of scientists _____ that three hours of outdoor exercise a week _____
good for our health.

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阅读理解
    CHICAGO- Have you ever worked on your laptop computer with it sitting on your lap, heating up your legs? If so, you might want to rethink that habit from now on. Doing it a lot can lead to “toasted skin syndrome (症状)”, an unusual-looking spotted skin condition caused by long-term heat exposure (暴露), according to medical reports.
    In one recent case, a 12-year-old boy from California developed a skin discoloration on his left lap after playing computer games a few hours every day for several months. “He recognized that the laptop got hot on the left side; however, he did not change its position, ” Swiss researches reported in an article published Monday in the journal Pediatrics.
    Another similar case is a Virginia law student who needed treatment for the spotted darkening on her leg. Dr. Kimberley Salkey, who treated the young woman, learned the student spent about six hours a day working with her computer placed on her lap. As Dr. Salkey later learnt, the temperature under the laptop could reach 51 degrees. That case, from 2007, is one of 10 laptop-related cases reported in medical journals in the past six years.
    The condition can also be caused by overuse of heating pads (垫子) and other heat sources that usually aren't hot enough to cause burns. It's generally harmless but can also cause such permanent (永久的) skin darkening. In very rare cases, it can cause damage leading to skin cancers, said the Swiss researchers, Drs. Andreas Arnold and Peter Itin from University Hospital Basel. They do not mention any skin cancer cases linked to laptop use, but suggest, to be safe, placing a carrying case under the laptop if you have to hold it on your lap.
    Dr. Kimberley Salkey said that under the microscope, the affected skin is similar to skin damaged by long-term sun exposure.
    Major producers including Apple and Dell warn against placing laptops on laps or exposed skin for long periods of time because of the risks for burns. In the past, “toasted skin syndrome” has happened to workers whose jobs require being close to a heat source, including bakers and glass blowers, and in people who gathered near hot stoves to stay warm.
    Dr. Anthony J. Mancini, chief at Children's Memorial Hospital in Chicago, said that it's unlikely that computer use would lead to cancer since it's so easy to avoid close skin contact (接触) with laptops.