研究发现，经常运动者会比“肢体不勤”者的快乐感多出52%，足够运动者的快乐感，比不运动者多了29%。所以①。那么，为什么运动时我们心情会更加愉悦呢？这是因为，锻炼时大脑立刻就会感受到压力，释放一种名叫脑源性神经营养因子的物质(BDNF)，它起到保护和修复记忆神经元的作用。与此同时，大脑会释放内啡肽，这些内啡肽将降低运动产生的不舒适感，减轻疼痛感，②。那么，我们如何能在最佳的时刻触发这种快乐？名为《开始的20分钟》的畅销书中写到，想要健康，想要快乐，就不要像运动员那样体力透支，往往只要20分钟的运动，就可以让你收获良多。可见，③。

2020年9月6日上午，2020 未来科学大奖获奖名单揭晓。4位获奖者中，有一位科学家的年纪刷新了未来科学大奖的纪录，他就是现年96岁的上海交通大学医学院附属瑞金医院教授：王振义院士，他与哈尔滨医科大学第一附属医院的张亭栋教授获得了“生命科学奖”，该奖用以表彰他们对治愈急性早幼粒细胞白血病(APL)做出的决定性贡献，单项奖金约700万元人民币。得知自己获奖的消息，王教授一方面为“科学得到重视”而高兴，另一方面对“为什么不奖励年纪轻的人”而感到“忧愁”。王振义院士还表示，奖金将全部捐赠给扶贫基金。

班级计划举行读书会，围绕上述材料展开讨论，请结合你的感受和思考写一篇发言稿。

要求：结合材料，选好角度，确定立意，明确文体，自拟标题；不要套作，不得抄袭：不得泄露个人信息；不少于800字。

    A recent study suggests that students who bring water into exams may improve their grades by 10 percent．

    Scientists then (比较) their exam results with their normal schoolwork grades．They found that all those had brought drinks with them got better grades．

    Scientists also considered the students 'schoolwork and (预计)their grades．This was to make sure that the reason was not simply that smarter students were more (有可能)to bring drinks with them．

    is unclear why drinking water improves exam results．But scientists say having enough water in our b and not feeling thirsty could have a helpful effect our brains．Drinking water may also cut d on anxiety ,which affects exam performances．

    So next time， w you are going to have a big exam，try bringing a bottle of water with you．Who knows—it may help you p the exam!

①子曰：“诵《诗》三百，授之以政，不达；使于四方，不能专对；虽多，亦奚以为？”（《论语·子路》）

②陈亢问于伯鱼曰：“子亦有异闻乎？”对曰：“未也。尝独立，鲤趋而过庭。曰：‘学诗乎？’对曰：‘未也。’‘不学诗，无以言。’鲤退而学诗。”（《论语·季氏》）

③子曰：“小子何莫学夫诗？诗，可以兴，可以观，可以群，可以怨。迩之事父，远之事君；多识于鸟兽草木之名。”（《论语·阳货》）

在孔子看来，学《诗》有哪些作用？请根据以上几则《论语》选文简要说明。

    Perhaps the most interesting person I have ever met in my life is an Italian professor of philosophy who teaches at the University of Pisa. 1 I last met this man eight years ago, I have not forgotten his 2 qualities. First of all, I respected his 3 to teaching. Because his lectures were always well-prepared and clearly delivered, students crowded into his classroom. His followers liked the fact that he 4 what he taught. Furthermore, he could be counted on to explain his ideas in an 5 way, introducing such aids to 6 as oil paintings, music, and guest lecturers. Once he 7 sang a song in class in order to make a point clear. 8, I admired the fact that he would talk to students outside the classroom or talk with them 9 the telephone. Drinking coffee in the café, he would easily make friends with students. Sometimes he would 10 a student to a game of chess. 11, he would join student groups to discuss a variety of 12: agriculture, diving and mathematics and so on. Many young people visited him in his office for 13 on their studies; others came to his home for social evenings. Finally, I was 14 by his lively sense of humor. He believed that no lesson is a success 15, during it, the students and the professor 16 at least one loud 17. Through his sense of humor, he made learning more 18 and more lasting. If it is 19 that life makes a wise man smile and a foolish man cry, 20 my friend is indeed a wise man.

    Try this: For an entire day, forget about the clock. Eat when you're hungry and sleep when you're tired. What do you think will happen?

    You may be surprised to find that your day is much like most other days. You'll probably get hungry when you normally eat and tired when you normally sleep. Even though you don't know what time it is, your body does.

    These patterns of daily life are called circadian rhythms, and they are more than just habits. Inside our bodies are several clocklike systems that follow a roughly 24-hour cycle. Throughout the day and night, our internal clocks direct changes in temperature, body chemicals, hunger, sleepiness and more.

    Everyone's rhythms are unique, which is why you might like to stay up late while your sister always wants to go to bed early. But overall, everyone is programmed to feel tired at night and energetic during the day.

    Scientists have known for a long time that the light of day and the dark of night play important roles in setting our internal（内部的） clocks. Now, new discoveries are giving scientists insights into how these clocks work.

    Learning about our body clocks may help scientists understand why problems arise when we act out of step with our circadian rhythms. For example, traveling across time zones can make people wake up in the middle of the night. Regularly staying up late can make kids do worse on tests and quizzes. And working shifts at night leads to higher rates of heart disease, diabetes and obesity.

    “There is a growing sense that when we eat and when we sleep are important parts of how healthy we are,” says Steven Shea, Director of the Sleep Disorders Research Program at Brigham and Women's Hospital in Boston.

    Scientists still aren't sure why the timing of sleep matters so much, Shea says. But research findings suggest that our circadian rhythms are more important than we give them credit for.

    “During the night, we are prepared to sleep,” Shea says. “During the day, we are prepared to eat and move around. If you reverse (颠倒)what you are doing, everything is out of phase. That can have unfavorable consequences.”

按照下面要求，按要求写作。

请从《呐喊》《边城》《红岩》《平凡的世界》以及《老人与海》中任选一部，为其中某个人物形象写一段述评。150字左右。

一方阳光

王鼎钧

四合房是一种闭锁式的建筑，四面房屋围成天井，住在里面的人也因此牺牲了充足的阳光。即使天气晴朗，室内的角落里也黯淡阴冷。幸而中午的阳光像装在簸箕里，越过南房，倾泻下来，从房门伸进来，照门框的形状，在方砖上画出一片长方形。

我永远能够清清楚楚看见，那一方阳光铺在我家门口，像一块发亮的地毯。然后，我看见一只用麦秆编成、四周裹着棉布的坐墩，摆在阳光里。然后，一双谨慎而矜持的小脚，走进阳光，停在墩旁，脚边同时出现了她的针线筐。一只生着褐色虎纹的程猫，喵呜一声，跳上她的膝盖，然后，一个男孩蹲在膝前，玩弄针线筐里的古铜顶针和粉红色的剪纸。那就是我，和我的母亲。

在那一方阳光里，我的工作是持一本《三国演义》或《精忠说岳》，念给母亲听。如果我念了别字，她会纠正，如果出现生字——母亲说，一个生字是一只拦路虎，她会停下针线，帮我把老虎打死。渐渐地，我发现，母亲的兴趣并不在乎重温那些早已熟知的故事情节，而是使我多陪伴她。每逢故事告一段落，我替母亲把绣线穿进针孔，让她的眼睛休息一下。

在我的记忆中，每到冬天，母亲总要抱怨她的脚病。

她的脚是冻伤的。当年做媳妇的时候，住在阴暗的南房里，整年不见阳光，两只脚永远冰冷，用手指按一下，你会看见一个坑儿。看不见的，是隐隐刺的疼痛。

母亲年年脚痛依然。尽管在那一方阳光里，暖流洋溢，母亲仍然不时皱起眉头，咬一咬牙。当刺绣刺破手指的时候，她有这样的表情。母亲常常刺破手指。据说，刺绣的时候心烦意乱，容易把绣花针扎进指尖的软肉里。

在那一方阳光里，母亲是侧坐的，她为了让一半阳光给我，才把自己的半个身子放在阴影里。只有左足感到了温暖舒适，相形之下，右足就特别难过。母亲咬牙的时候，没有声音，只是身体轻轻震动一下。这时，我和猫都仰起脸来看她，端详她平静的面容上几条不平静的皱纹。

我忽然得到一个灵感：“妈，我把你的座位搬到另一边来好不好？换个方向，让右脚也多晒一点太阳。”

母亲摇摇头。

我站起来，推她的肩，妈低头含笑，一直说不要。座终于搬到对面去了。以后，母亲一旦坐定，就再也不肯移动。很显然，她希望在那令人留恋的几尺干净土里，她的孩子，她的猫，都不要分离，任发酵的阳光，酿造浓厚的情感。她享受那情感，甚于需要阳光，即使是严冬难得的煦阳。

卢沟桥的炮声使我们眩晕了一阵子。母亲的世界也测到一些震波。那年冬天，我们最后拥有那片阳光。

母亲在那一方阳光里讲了一个梦，对我而言，那是她最后的梦。

母亲说，她在梦中抱着我，站在一片昏天黑地里，不能行动。四野空空旷旷，一望无边都是碎琉璃。碎片最薄最锋利的地方有一层青光，纯钢打造的刀尖才有那种锋芒，对不设防的人，发生无情的威吓。而母亲是赤足的，几十把玻璃刀插在脚边。

我躺在母亲怀里，睡得很熟。母亲想，万一她累昏了，孩子掉下去，怎么得了？想到这里，她的心立即先被琉璃碎片刺穿了。某种疼痛由小腿向上蔓延，直到两肩、两臂。

就在完全绝望的时候，母亲身旁突然出现一小块明亮干净的土地，像一方阳光这么大，平平坦坦，正好可以安置一个婴儿。谢天谢地，母亲用尽最后的力气，把我轻轻放下。谁知道我着地以后，地面忽然倾斜，我安身的地方是一个斜坡，像是又陡又长的滑梯，长得可怕。我快速地滑下去，比飞还快，转眼间变成一个小黑点。

在难以测度的危急中，母亲大叫，醒来之后，略觉安慰的倒不是我好好地睡在房子里，而是事后记起我在行中突然长大，还遥遥向她挥手。

母亲知道她的儿子绝不能和她永远一同围在一个小方框里，儿子是要长大的，长大了的儿子会失散无踪的。

时代像筛子，筛得每个人流离失所，筛得少数人出类拔萃。

于是，她有了混合着骄傲的哀愁。

她放下针线，把我搂在怀里问：“如果你长大了如果你到很远的地方去，不能回家，你会不会想念我？”

我没有思念过母亲，不能回答这样的问题。母亲梦中滑行的景象引人入胜，我立即想到滑冰，急于换一双鞋去找那个冰封了的池塘。

跃跃欲试的儿子，正设法挣脱伤感留恋的母亲。

母亲放开手凝视我：

“只要你争气，成器，即使在外面忘了我，我也不怪你。”

（有删减）

— I expect _______ over 200 students then.

1). 词数100左右，信的开头和结尾己为你写好;

2). 可以适当增加细节，以使行文连贯。

Dear Editor-in-Chief，

    My name is Li Hua and I'm writing to apply for the position of the student reporter you advertised in the 21^th Century.

    Looking forward to your reply.

Sincerely yours,

Li Hua

在柴米油盐酱醋茶的日常生活中，我们希望自己能够拥有不同寻常的色彩。这色彩，来自对美和诗意的追寻。寻找并分享生活中的美和诗意是人的天性。诗和艺术不是从生活中抽离出来的高高在上的奢侈品，而是流动着的生命长河的一部分。这种美和诗意稍纵即逝，只有通过文字或者其他形式的记录才可以将其定格，既为自己的记忆留下备份，又可以分享给更多人。过去，人们的诗情多半默默地在放心底；今天，普通人的诗情可借助智能手机等被生成、被传播、被欣赏。当下，短视频的出现，带来了艺术和美学的范式变革：传统意义上纯粹学术性与欣赏性的美学，正在转化为普通人的实践美学。短视频的内容有个性、有趣味，易于生成、便于转发和传播，让人们在创造和分享中获得愉悦的精神享受。用户生产内容这种模式更是不断为——大众创造+大众传播提供新的可能性，让更多人在参与中欣赏、在参与中创造。不过，值得注意的是短视频平台上的内容良莠不齐，一些产品存在低俗、恶搞、做作、浮夸的问题。未来，我们需要进步提升内容的品质，塑造人文雅趣，帮助人们成为“生活艺术家”，助力塑造美的心灵。