以下化学用语中，正确的是（   ）

She has a lot of hobbies, r from playing chess to canoeing.

双方的商讨已经破裂，哪一方应负责还不清楚。

Discussions between the two sides have . It is not clear which side is

100mLA₂气体跟50mLB₂气体恰好完全反应，生成的气体体积为100mL（同温同压条件下），试推断气体生成物的化学式，推断的依据是．

室温下，某容积固定的密闭容器由可移动的活塞隔成A、B两室，分别向A、B两室充入H₂、O₂的混合气体和1 mol空气，此时活塞的位置如图所示，且实验测得A室混合气体的质量为34 g。则下列说法中错误的是（    ）

Jiang Min is one of the (代表)in the 18^th CPC National Congress.

阅读理解。

    “Is there anything else you need, honey？” my dad asked  me as he put three twenty­dollar bills in my hand. I was traveling  back home from a family visit, and after treating me to breakfast  and filling my car with gas, it was obvious that my dad wanted  to make sure that I would be okay on the road.

    “No, Dad. You've done so much already. Thank you！” I was overwhelmed once again by his kind acts of providing  everything I needed, despite the fact I just turned 40. Yet I realize that in my father's eyes, I will always be his little girl. He takes deep pleasure in knowing his children are all right.  Now that he has enough money, he loves to give whenever he  sees a need.

    But this was not always the case.  Divorced from my mother when I was 11, my dad couldn't be around his kids as  often as he would have liked. Money was also tight; even weekend visits were rare. However, my dad stayed in constant  communication with us and made sure he was involved in our lives. Though he couldn't always be there in person, I knew  he was only a phone call away. I could always count on that.

    Even now, almost 30 years later, I treasure knowing that I can pick up the phone and call Dad, and he'll be there for me. I have a wonderful husband, but that hasn't changed how   Dad sees me. I'm still his child and he loves to see that my   needs are met.

    I remember a time when I was shopping in a hardware store(五金店)with Dad. I mentioned my plans to paint one wall in my house. Well, that's all it took for Dad to take   action. By the time I got to the checkout(结账) line, all the supplies I picked out were put out of my hands and placed with things he bought.

    Then there was the time when I took him with me to do some grocery shopping for just a few “ items”. By the time we  were finished, my shopping cart was full of groceries from  every shelf in the store! My sister and I joke that if you don't want Dad to buy it for you, avoid even mentioning you want something.

We feel our duty to make our country strong.

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Everyone can help to save the world

    We are all environmentalists now. We all know about acid rain and the ozone hole.  As consumers we have the power to make decisions which will contribute to a better world and it is in our power to do what we can to protect the earth.  

     In this way we have the power to influence retailers (零售商) to sell us those so-called "green" products. Therefore, the supermarkets have understood the message and are now trying to improve their environmental image. They are turning to less wasteful and recyclable packaging. The range of "green" products will continue to expand to meet the growing demand. This message has also reached the manufacturers. They have realized that protecting the environment may start as an advertising campaign but in the hands of intelligent people it can become a very profitable business. Besides, we can do more.

    Furthermore, we also know there are other areas where all of us can make a positive contribution to a cleaner, healthier and safer environment. There are a number of ways we can do this. For example, we now know how important it is to have our homes well insulated (隔热). We should choose the best energy efficient technology, such as modern light bulbs which can reduce electricity consumption by 80% over the older ones. We must also work hard to reduce the amount of rubbish we produce. We all produce tons of rubbish and waste disposal has become a big problem. As an environmentally-conscious consumer we should buy products which do not have so much packaging. Also, we should try to avoid non-returnable goods at all costs. In Scandinavia and Germany, for example, plastic bottles and cans are now returnable goods.  

    In conclusion it is important to emphasize once again the rise of consumer power. We must realize that we are all part of the problem.  

A. We can all reduce energy consumption at home and so cut the emissions from power systems.

B. For example, when we walk into a supermarket we can choose to buy environmentally friendly products and reject products which damage our planet.

C. There are some other ways to protect the environment.

D. Companies are developing environmentally friendly products that maintain a high quality and a low price.

E. But what are we doing about these problems?

F. Nevertheless we must also realize that we have the responsibility to be part of the solution.

G. Everybody has the duty to contribute to a cleaner world.

水星大气中含有一种被称为硫化羰（化学式为COS）的物质。已知硫化羰与CO₂的结构相似，但能在O₂中完全燃烧。下列有关硫化羰说法正确的是（      ）

从修辞角度看，与其他三项不同的一项的是（   ）

Mary was often told that she __________ her elder sister Ellen.

Tony said that she must feel very unhappy to say that. Claire thought it was ridiculous to be offered      by a robot.

现代文阅读Ⅱ

阅读下面的文字，完成各题。

霍乱之乱

池莉

霍乱发生的那一天没有一点预兆。天气非常闷热，闪电在遥远的云层里跳动，有大雨将至的迹象。

在从事流行病防治工作的三年里，我们每天收到疫情卡片几乎都是肝炎。肝炎的临床治疗就是那么老一套，枯燥的重复的日常工作消蚀了我的光荣感和积极性，三年过去，我已经变得有一点油滑和懒惰。秦静不甘平庸，准备改行，她对病毒感兴趣，准备报考一位著名的病毒学家的研究生。

有一天，我和秦静去供应室领设备。被值班人员敷衍。我很生气，回来抱怨。科室主任闻达说：“年轻人， 你不能老抱怨，我们事业的重要性是不言而喻的。医疗系读几年？最多四年，可我们卫生系却要读五年乃至六年。临床医生懂的我们都懂；临床医生不懂的，我们也懂。我们是什么？我们是研究人员。我们防患于未然。我们保护人们免受疾病的侵害。我请你们想想，孰轻孰重，这不是一目了然吗？”看着闻达骑上他那破旧的自行车走了，秦静叹了口气，我说：“难怪人家说，远看是个要饭的，近看是个烧炭的，一问才知道是防疫站的。”

五点差五分的时候，科室里的人基本走光了，只剩下主任闻达。闻达猫在大办公室的小套间里，伏案写他永远也写不完的流行病学调查报告。他头发凌乱的脑袋在满满一桌的书本、卡片和资料堆中微微摇晃，嘴唇嚅动，念念有词，从油漆斑驳的办公桌底探出老远的，是他瘦骨伶仃的长腿和那双穿着破皮鞋的大脚。闻达哪里像马来西亚归国华侨，新中国第一代科班出身的流行病学专家？传说早在一九五六年，闻达只有二十四岁的时候，就西装革履地出过国，被特邀参加联合国世界卫生组织的年会。传说他戴的是金丝眼镜，穿的是乳白色的优质牛皮鞋。传说他家里有相册证明他过去的翩翩风度和辉煌历史。现在，闻达主任已经追踪流行性感冒二十年了，同时还不断地增加着追踪研究的项目，如血吸虫病、钩端螺旋体病等等。总之闻达主任对所有的流行病都怀着巨大的兴趣和热情，工作量极大的报告写作使他每天都要推迟约一个小时下班。

霍乱来了，在这个天气恶劣的夜晚，在它的踪影在中国消失了几十年之后。正在值班的我和秦静对它的一点认识仅限于知道它的厉害和可怕。我们傻了眼。我接连打通我们站张书记和祈站长家里的电话，向他们报告了霍乱疫情。他们都大吃一惊，都说马上赶到站里来。并且都问闻达知道不知道。我捉醒他们说闻达主任不够安装电话的级别，没有办法通知他。

张书记大声说：“你赶快去 医院的车库带车，把闻主任立刻接到站里来。”

我赶到闻达主任家时，他正在拖地板。听着我上气不接下气的报告，他的愁眉苦脸渐渐云开日出。闻达扔开拖把，用命令的口气让妻子给他收拾两件换洗衣服。他妻子说：“住单位不回来了，有这么严重？”闻达说：“霍乱为什么又叫二号病？ 它是威胁人类生命的第二号烈性传染病，问题还在于，他们没有谁了解霍乱，只有我，我一直在研究它。”

五层楼的防疫站蓦然间灯火通明，各个科室的人马全都连夜冒雨赶到了站里，大家对霍乱除了恐惧，其他一无所知。八大科室的一百多号人在站里挤来挤去。相互打听情况，雨水在地上被踩得“吧吧”作响。张书记和祈站长被大家大呼小叫地扯去询问，答非所问地应付着。大家都非常地不满意，到处是寻找闻达的声音：“闻主任呢？ 老闻呢？闻达呢？闻老师呢？”

我大喊一声：“闻主任来了！”大家的目光一下子都集中了过来。

张书记和祈站长见到闻达如见救星，与他紧紧地握手，说：“乱成一锅粥了， 现在看你的了。”

在防疫站的大厅里，闻达看见一把椅子，便一把拖过来，不假思索地蹬了上去，说：“霍 乱疫情，如洪水猛兽。我要赶快讲讲具体方案。”

闻达异常的简洁、异常的有条理使大家统统折服了，他一口气宣布了八条意见：

第一，以流行病室为核心，组成一个紧急行动小组；其他各科室都听从紧急行动小组指挥，有令则行，无令则止。

第二，化验室立刻复查粪祥培养基的菌落，再一次确认霍乱孤菌，具体操作由闻达指导。

第三，流行病室连夜出发，追踪病人，隔离病人并确定疫点。

闻达说完，大家都像吃了定心丸。祈站长有心思开玩笑了，他说：“老闻好像经过了多少次霍乱疫情似的，出口成章啊。好比老母鸡，屁股一撅就下了一个蛋。”大家开心一笑，各就各位，回到自己的科室去做准备工作。

市领导来了，卫生局领导来了，与我们挂钩的这所大医院的院长副院长也来了。

我们很快在郊区找到了感染霍乱的人，并把他所在的村子封锁。

封锁区隔离了总共十四天。在最后一例带菌者连续三次粪检阴性之后，我们才鸣锣收兵。

第二年夏天，我放弃了流行病医生这一职业，彻底转行。秦静还在坚持。十几年后，闻达与秦静合作的关于那场霍乱的论文在世界卫生组织的年会上宣读。

说真的，我这个人实在是没有勇气为了消灭什么而遭遇什么，为了不可知的结果而长久地等待，为了保存内心而放弃外壳。但是，在十几年之后，我懂了有一些事情是值得你去这么做的。闲暇的时候，发生霍乱的那一天经常出现在我的回忆中，我在回忆中为自己寻找生活的道理。(有删改)

下列各句中，加点的成语使用正确的一句是（   ）

在0℃和101kPa的条件下，将4.00g 氩气、1.40g 氮气和1.60g 氧气混合，该混合气体的密度是相同条件下氢气密度的（   ）

假定你是高二学生李华，你在网上看到一个国际中学生组织将举办2017年暑期夏令营并对此很感兴趣。请你给主办方写一封信提出申请，并咨询相关情况。主要内容包括：

1）. 申请并介绍个人参营的原因和优势；

2）. 咨询夏令营时间及内容安排；

3）. 个人最期待的活动。

注意：1）.  词数100左右； 2）. 可以适当增加细节，以适行文连贯；

3）.开头句已为你写好，不计入总词数。

Dear Sir/ Madam,

    I have read your advertisement on the Internet that the Organization of International High School Students is to hold the 2017 Summer Camp. ……

Yours,

Li Hua

阅读下面的材料，根据要求写作。

12月4日，《咬文嚼字》编辑部公布“2020年十大流行语”，其中有：

逆行者：指由于职责和信念所系，在发生重大危险时不顾个人安危，迎难而上，去拯救他人生命、财产安全的人。

后浪：2020年五四青年节，短视频《后浪》中以“后浪”称呼新一代年轻人，表达了对他们的认可和赞美。新冠疫情中，“后浪”承担起历史赋予他们的责任和使命，成为“希望一代”。

神兽：本指中国古代民间神话传说中的动物。今年成为疫情期间居家上网课的孩子的代称。这些孩子聪明可爱却调皮捣蛋。他们在家学习，家长与之斗智斗勇，如跟“神兽”相斗。

打工人：2020年9月，一网友发了一条自拍短视频，说：“勤劳的人已经奔上了塔吊，你却在被窝里伸了伸懒腰，你根本没把自己生活当回事儿。早安，打工人！”自此，无论是社会精英还是普通职员，无论是脑力劳动者还是体力劳动者，都称“打工人”。

内卷：2020年下半年，有几张图片刷屏：有人骑在自行车上看书，有人边骑车边用电脑，有人床上铺满了一摞摞书……“边骑车边用电脑”的同学被称为“卷王”登上热搜。“内卷”流行开来，高校学生用它指非理性内部竞争。现在，各行各业内部的非理性竞争都以“内卷”称之。

2021年学校的第一次升旗仪式上，你将作为学生代表发表演讲，请结合以上材料中的两三个关键词，写一篇演讲稿。

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。

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

    I am so tired of winter. First it was all the snow and now it's just rain, rain, rain. It (seem) like the cold and rain have been here so long that I can (hard) remember what the sun looks. It has been wet and miserable for weeks and weeks.

    All I want to do is climb into bed, crawl under the covers, hide from the world until spring is really here. official first day of spring is in less than a week, but you wouldn't know it at all from the weather.

    I have been feeling so bad lately and think it has a lot to do with the (depress) weather this month. March is just the (bad) month in my opinion.

    Today I got thoroughly wet my way home from work. It started to pour when I was walking to my car, which (park) at the end of the lot. Why do I always forget (bring) an umbrella with me?

    I had a hard time (drive) home. I was wet and the traffic was terrible. But I am home now and happy that the day is over.

Over the past years, scientists have made many great b in science and technology.