某一元醇10g与乙酸反应生成乙酸某酯11.2g，反应后又回收该醇1.8g，则醇的相对分子质量接近于（   ）

I don't know what to wear tonight—have you got any (建议)?

既然我们没钱给对方买礼物，就自己动手做一件吧。(since)

阅读下面这首宋诗，完成下面小题。

浣溪沙•和无咎^①韵

陆游

懒向沙头醉玉瓶，唤君同赏小窗明。夕阳吹角最关情。

忙日苦多闲日少，新愁常续旧愁生。客中无伴怕君行。

（注）①韩元吉，字无咎，南宋许昌人，与陆游友善，多有唱和。陆游通判镇江时，韩无咎从江西来镇江探母，陆游与其交游两月。《浣溪沙》作于韩无咎即将离开镇江之际。

在120℃、1.01×10⁵Pa时，某气态烃和足量的O₂点燃完全燃烧，相同条件下测得反应前后气体总体积没有发生变化的是（   ）

0.5mol的Fe和一定量稀硝酸恰好完全反应生成Fe（NO₃）₂、Fe（NO₃）₃和NO，经测定其中Fe（NO₃）₂与Fe（NO₃）₃的物质的量之比为3：2，请计算：

被新冠状病毒肺炎疫情改变的“成语”，越显得特别有新意，还能给人以触动，合情合理。请仿照示例相写一个创新“成语”，并做解释。要求：所写创新“成语”与新冠状病毒肺炎疫情相关，解释合理，有正面意义，句式不要求相同，字数不限。

示例：

疫不容辞——疫情就是命令， 防控就是责任，职责所在，疫不容辞。

It was reported that one of the prisoners attempted to e from the prison this morning.

改错题
Dear Mr Green,
    I am very exciting to learn that we are going to start a magazine together. It is indeed a wonderful idea and everyone hopes its success.
    I would like a magazine to have three columns: News, Teachers' Advice or Students' Voice. From the News column we can learn about what was going on in both of our schools. In Teachers' Advice, our teacher can give us such help that we may not be able to get in the classroom. Students' Voice will allow us to free express our thoughts and feelings about our lives and studies.
    I believe that this magazine will surely strengthen between our ties, and I am looking forward to read it.
Yours faithfully,
Li Hua

用10mL的0.1mol•L^﹣1 BaCl₂溶液恰好可使相同体积的硫酸铁、硫酸锌和硫酸钾三种溶液中的硫酸根离子完全转化为硫酸钡沉淀，则三种硫酸盐溶液的物质的量浓度之比是（   ）

某铁的“氧化物”样品，用5mol/L盐酸50mL恰好完全溶解，所得溶液还能吸收标准状况下0.56L氯气，使其中Fe²⁺全部转化为Fe³⁺ ， 该样品可能的化学式是（   ）

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

    In 1863 the first underground passenger railway in the world opened in London. It ran for just under seven kilometers and allowed people to avoid terrible  (crowd) on the roads above as they travelled to and  work. It took three years to complete and was built using an interesting method. This included digging up the road,   (lay) the track and then building a strong roof over   top. When all those had been done, the road surface was replaced.

   Steam engines  (use) to pull the carriages and it must have been (fair) unpleasant for the passengers, with all the smoke and noise. However, the railway quickly proved to be a great success and within six months, more than 25, 000 people were using   every day.

   Later, engineers  (manage) to construct railways in a system of deep tunnels (隧道), which became known as the Tube. This development was only possible with the  (introduce) of electric-powered engines and lifts. The Central London Railway was one of the most  (success) of these new lines, and was opened in 1900. It had white-painted tunnels and bright red carriages, and proved extremely popular with the public.

氨碱法制纯碱包括石灰石分解、粗盐水精制、氨盐水碳酸化等基本步骤。

完成下列计算：

¹⁶₈O，¹⁸₈O，O^2﹣、O₂、O₃是（  ）

已知碳有三种常见的同位素：¹²C、¹³C、¹⁴C氧也有三种同位素：¹⁶O、¹⁷O、¹⁸O，由这六种核素构成的二氧化碳分子中，其式量最多有（   ）

阅读下面的材料，根据要求写作。

岁月流转，掠过满天星斗。从董存瑞、雷锋，到钱学森、陈景润，再到“四大天王”和周杰伦。到2020年中国武汉成功战胜疫情后，无数青年又以挽救生命的医生、护士为心中的榜样，崇拜他们的专业、勇气和担当。

不同的时代，人们存在着不同的精神偶像与价值追求。你的偶像是谁？他/她（们）为什么会成为你的偶像？

请联系自己的生活实际，结合材料，写一篇记叙文。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。

名篇名句默写

阅读下面的文字，完成下面小题。

材料一：

近期对外公布的《健康中国行动2019—2030年》中明确提出，要将高中体育科目纳入高中学业水平测试或高考综合评价体系，鼓励高校探索在特殊类型招生中增设体育科目测试。

教育部体育卫生与艺术教育司司长王登峰表示，未来将多管齐下，确保高中生能够每天锻炼一小时，每周按时按标准上体育课。教育部会不断采取相应措施、完善政策，在学校体育课时保障、教学内容严格监管和学校体育教学效果评估等方面，陆续出台一系列激励政策，调动学生积极参与体育锻炼、体育竞赛活动的积极性。

（摘编自《教育部：确保高中生每天锻炼一小时，每周按时按标准上体育课》，2019年7月27日）

材料二：

某地区就每天在校体育锻炼的时间问题，随机采访了若干名学生。其中分组情况：A组时间小于0.5小时，B组时间大于等于0.5小时且小于1小时，C组时间大于等于1小时且小于1.5小时，D组时间大于等于1.5小时。

   

材料三：

过去5年，学生体质与健康状况有所改善，但中小学生营养过剩的情况普遍，超重和肥胖比例持续增加；在所有年龄层，近视的比例都在上升，而且有向低龄层次扩散的危险。虽然全国学生体质总体有提升，但提升效果不明显，某些方面还有下降趋势。

国家教育督导团督导检查发现，部分地区学生每天锻炼一小时的目标仍然不能全面落实。从检查的学校来看，海南、吉林等省市部分学校体育课时仍然开设不足，许多学校没有开展大课间体育活动，或者课间活动时间普遍不足25~30分钟，活动内容简单；部分地区小学1-2年级体育课开设时数不足，初中、高三体育课时存在挪占现象，学生每天一小时体育活动时间还得不到保证。部分中小学体育教学设施短缺、师资不足。

调查显示，一些省份中小学校体育工作条件达不到国家基本要求。其中，吉林省小学、初中、高中体育运动场地面积达标的学校分别占29.1%、62.7%和62.2%，体育器材平均达标率不足50%；山东省小学场地达标率为34.1%，中学为53%，器材配置达标率为10%.

教育部一份统计数字表明，全国城市（包括县、镇）学校需要体育教师336346人，缺少87278人，缺额26%；农村学校需要体育教师392821人，缺少234437人，缺额60%.

（摘编自《教育调查：中小学生的体育锻炼为何这么难？》）

材料四：

美国小学低年级阶段，学校的课程主要是体育、语言、数学、科学、音乐、美术，体育是主科之一，除了每天一节的体育课，一周当中会有两三节下午的活动课，也有教排球、篮球基础技能的体育课，算下来每周一到周五，每天至少有一节体育课，一周会有2~3节的活动课，加上中午自由活动的时间，孩子们每天在校内能保证近两小时的运动锻炼。二年级的男孩子们组队打篮球比赛已经有模有样。

在孩子们升读初中、高中，报考大学时，体育是一个非常重要的指标，如果能成为校队成员，孩子升学时能占很大优势。学校的体育教育也有着非常立体的结构，科学课中有对人体的认知内容，还有基础的运动科学。在书店里，青少年读物货架上，有非常丰富的体育类书籍和体育名人传记。更具导向作用的，是整个社会对于体育运动的重视，比如美国社会可以用是否经常运动来作为阶层的划分依据，中产以上的家庭非常重视体育运动，成年人也会保持充分的锻炼时间；美国总统选举过程中，参选人的运动习惯、身材是否保持苗条也会影响选举人的喜恶。

（摘自“新浪体育”《美国娃的体育课怎么上》，2018年3月4日）

阅读理解

Walk Out of the Comfort Zone and Try New Things

    For most high school students, free periods are useless. From what I have seen, few do homework, instead many are on their phones and talking, making it impossible for those who actually want to do work to complete any. As a senior next year, I think extra periods should be used to take optional subjects.

    Our school offers many classes. Now is the time to experiment in different fields of study. We will never know if we are interested or talented in a subject if we don't try it.

    In my 8th grade, I was told that I had to take an art class as a graduation requirement; so in the 9th grade I took Studio and Art. One of the projects was to build a clay pot, but I built mine incorrectly, so it broke in the kiln (窑). I found out that I have no artistic ability at all, and now I know for sure that I do not want to be an artist. However, the class was one of my favorites that year. I was able to try new activities and test my ability.

    Walk out of our comfort zone and try new things! College is when we should focus on a specific major, but high school is when we have to figure it out.

    Half of all college students change their major at some point. By doing that hundreds of dollars are wasted on classes that they would have never needed to take. So use our extra periods to find out what we want to do in college. The classes we choose can impact us in future. Taking optional subjects will enrich our mind. It will also show colleges we are diverse students.

He was just about to (跳水) when he saw the shark.