下列表示正确的是（    ）

下面是南山XX中学学生刘林写给《语文报》编辑部的投稿信，其中有五处表达存在不得体的情况，请你找出来并进行修改。

《语文报》编辑部：

我是南山XX中学学生刘林，是一位酷爱写作的妹仔。久闻你刊大名，决定投稿。现奉上大作《蒙茶飘香》一篇，敬请拜读。还望务必拨冗回示为谢!

此致

敬礼!

刘林

2019年1月11日

① 改为 

②改为

③改为 

④改为

⑤改为

补全对话

A:  tomorrow?

B: I'm going to buy a gift.

A: ?

B: I'm going to give it to my mother.

A: ? 

B: I'm going to buy a bunch of flowers.

A: ?

B: I'm going to buy it in the Flower World.

A: Are you going there alone?

B: No. with my sister.

A: Your mother will be happy.

— How do you find the British Museum?

— Great! It's ________worth________.

Do you still remember the exhibition farm we visited three months ago?

一定温度下，W g下列物质在足量氧气中充分燃烧，产物与过量的Na₂O₂完全反应，Na₂O₂固体增重W g，符合此要求的组合是（   ）

①H₂        ②CO    ③CO和H₂④HCOOCH₃⑤OHC﹣CHO．

镁粉和铝粉分别与等浓度、等体积的过量稀硫酸反应，产生气体的体积（V）与时间（t）关系如图，下列说法正确的是（   ）

请对下面新闻报道进行压缩，要求保留关键信息，语句简洁流畅，不超过50个字。

中国进入老龄化社会20年来，老年人口已从1.31亿升至2.49亿。但由于劳动力供给依然充足，人口素质大幅上升等因素，老龄化社会的人口红利仍然存在。当前，中国人的健康水平和受教育水平整体提升，中国正从人力资源大国向人力资本大国转型，老年人力资源开发潜力巨大，健康寿命的延长对老年人口经济的参与提供了基本保障。各种公共政策在有力推动老龄产业发展，这有利于经济增长方式转型。

在一密闭容器中有HCHO、H₂、O₂共26.5g，用电火花引燃烧，使其完全燃烧，再将燃烧后的气体用Na₂O₂充分吸收，Na₂O₂增重10.5g，则原混合气体中O₂的物质的量是（   ）

已知草酸氢铵(NH₄HC₂O₄)在200℃分解的化学方程式为NH₄HC₂O₄=NH₃↑+CO↑+CO₂↑+H₂O↑。在真空密闭容器中充入适量草酸氢铵加热至完全反应，得到混合气体的平均相对分子质量为( )

某天然碱（纯净物）可看作由CO₂和NaOH反应后的产物所组成．称取天然碱样品四份，溶于水后，分别逐滴加入相同浓度的盐酸溶液30mL，产生CO₂的体积（标准状况）如下表：

	Ⅰ	Ⅱ	Ⅲ	Ⅳ
盐酸液的体积（mL）	30	30	30	30
样品（g）	3.32	4.15	5.81	7.47
二氧化碳的体积（mL）	672	840	896	672

In order to deliver a clear (present), I explained the traditional procedure of making tea in detail.

He fed up with the tough training of the team and decided to(退出).

关于 ¹⁶O，说法正确的是（   ）

阅读下面的文字，完成下面小题。

我很喜欢到荷塘边走一走，坐一坐，观荷、赏荷。夏季的下午，阳光灿烂，水波不兴，数百朵荷花静静伏在水面，没有动作，没有声息。起风了，荷花听到了风的呼唤，随风翩翩起舞，宽大的碧绿舞裙摇曳翻飞，柔软的腰身划出各种优美的曲线，粉红的头颈灵活地摆动，顾盼自如。雨中的荷花却又是一种姿容。细雨潇潇，我坐在荷塘南边的九曲长亭里观赏荷花。密集的小雨珠滴在宽大的荷叶上，“刷、刷、刷……” ， 如无数把沙锤在轻轻挥动，似在抚摸我的皮肤，又似在抚摸我的心。雨大了些，增大的雨珠齐齐打在荷叶上，“啪、啪、啪……”，如无数定音鼓在敲动。“大珠小珠落玉盘”，就是这个样子，就是这种声音啊。雨中的荷叶，就是一把琴，就是一张鼓，任雨水来拨动，来敲打，奏出别致的天籁。独坐亭台，聆听这免费的天然音乐会，感受可用两字表达——陶醉。

同位素示踪法可用于反应机理的研究，下列反应或转化中同位素示踪表示正确的是（   ）

阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。注意：每个空格只填一个单词。

    Many people need guidance in choosing a career （职业）. Fortunately, there is much information on the Web about job opportunities （机会）. With all the information available, it's not surprising that people can feel confused. So if you're ready to start your first job or change careers, where do you begin?

    The Occupation Handbook is a good resource.  Regularly updated, the Handbook is available as a book and on-line. Not only is information provided about the United States as a whole, but readers can easily search for information about their particular state. You can read about the fastest-growing occupations in the area where you live and find out what they are like. You can also learn how to apply for jobs.

    Take, for example, Nadia's situation. Nadia was a doctor's assistant in Iran, and her goal in the United States is to become a nurse. However, she needs to work while she is studying nursing. She is interested in becoming a medical assistant to help work her way through college. When going on-line to the Handbook and searching under "medical assistant", Nadia is happy to read that this is expected to be one of the fastest-growing careers through 2010. Besides, job opportunities are even better for people with experience. She discovers that medical assistants not only have to do some office work, but have medical responsibilities as well. Nadia decides this job will be interesting and will also provide excellent experience for her nursing career.

    The Occupation Handbook is just an example of websites that can help you plan a new career. When you have found information about some different careers, you will be ready to talk to career advisers. Choosing your future career is an extremely important decision. It's worth taking the time and finding as much information as you can.

Title	Finding information on the   for Tomorrow's Job
Introduction	☆  There is a lot of job information on-line, but too much of it may sometimes be
Facts of the Handbook	☆  The information is updated in a   manner. ☆  Its vast resources include ways of job
Nadia's	☆  She wants to become a nurse in the United States. he needs to work to make  for her college study. ☆  Her previous   may help her to get the job. ☆ If she's a medical assistant, he'II also take medical
Conclusion	☆ Find some information on-line before            career advisers. ☆  The time you spend and the efforts you make will be

阅读下面的文段，回答问题。

倦  夜

杜甫

竹凉侵卧内，野月满庭隅。

重露成涓滴，稀星乍有无。

暗飞萤自照，水宿鸟相呼。

万事干戈里，空悲清夜徂！

在150℃时，（NH₄）₂CO₃分解的方程式为：（NH₄）₂CO₃ 2NH₃↑+H₂O↑+CO₂↑，若完全分解，产生的气态混合物的密度是相同条件下氢气密度的（　　）

丁烷可发生反应：C₄H₁₀ C₂H₆+C₂H₄ ， C₄H₁₀ CH₄ + CH₃CH=CH₂ ， 假定丁烷只按上述方式完全裂解，将m g裂解气缓缓通过盛有足量的Br₂的CCl₄溶液（不考虑Br₂和CCl₄挥发）的洗气瓶，充分吸收，溶液增重恰好为 g，则裂解气中n(乙烯)/n(丙烯) 为（   ）