丰台区2018—2019学年度第一学期期末练习
初三英语
知识运用（共14分）
一、单项填空（共6分，每小题0.5分）
从下面各题所给的A、B、C、D四个选项中，选择可以填入空白处的最佳选项。
1. Tom is my little brother. _______ likes arts very much.
A. She
B. He
C. It
D. His
2. Mr. Clark is always busy working _______ the office.
A. at
B. on
C. of
D. to
3. – _______ was the movie last night?
– It was interesting.
A. When
B. Where
C. How
D. What
4. I was late for school, _______ there’s something wrong with my bike.
A. but
B. because
C. or
D. though
5. I ______ go now, or I’ll miss my football class.
A. can
B. might
C. must
D. could
6. I think Li Bai is one of _______ poets in China.
A. great
B. greater
C. greatest
D. the greatest
7. – What do you often do at weekends?
– I often _______ my grandparents.
A. will visit
B. visited
C. visit
D. have visited
8. My sister _______ a model plane when I got home.
A. makes
B. was making
C. is making
D. has made
9. The boy _______ 3D painting last summer vacation.
A. learned
B. will learn
C. has learned
D. learns
10. My uncle is a writer. He _______ many books since he was young.
A. writes
B. wrote
C. is writing
D. has written
11. A new sports center _______ near here next year.
A. builds
B. will build
C. is built
D. will be built
12. – Can you tell me _______ to London?
– Sure. Next month.
A. when you will travel
B. when you traveled
C. when will you travel
D. when did you travel
二、完形填空（共8分，每小题1分）
阅读下面的短文，掌握其大意，然后从短文后各题所给的A、B、C、D四个选项中，选择最佳选项。
When I was 14, life felt dull and boring. I didn’t really care t o notice the differences among the students in my school. But this d u l l view of mine changed when my parents bought me a
13 for Christmas.
Even though I didn’t know anything about photography, I
showed great interest in the new 14 . I kept taking photos for
different people around me and plants in the field.
Then after a month, I realized I had no 15 for taking pictures. My photos were clearly missing something of importance and lacked originality (创意). Soon, I became so 16 with my lack of artistic talent that I quit my new hobby.
During the summer vacation, I went for a walk on the railroad track behind my house. The tracks are a warm red color. It’s an amazing sight to see. Before the walk, I thought, “Maybe I should bring my camera”, which hadn’t been touched for weeks.
Surprisingly, this walk on the tracks has 17 my love for photography. When I was walking on the train tracks without a model to photograph and only nature around me, I 18 how important it was to look at the details of things. I didn’t worry about trying
to create something beautiful. Instead, I just captured (捕捉) photos of the beauty already around me.
After months of studying outdoor scenes, watching shadows and staring at people’s eyes — I was finally able to 19 beauty of my own.
So far, my work has been published in two small magazines and showed in two art galleries. They are important to me because they are signs of how much my artistic abilities have grown: I went from zero artistic talent to being published. And my photos have become something I was 20 of.
Thanks to this Christmas gift from my parents, I now have a new way of looking at the world.
13. A. camera B. computer C. magazine D. plant
Do
Jessica,
China
21. What does Jessica like best?
A. Playing the violin.
C. Writing novels
22. Who can cook without parents’ help?
23.
The Lady’s Lamp
Once there was a poor lady who lived on a hill near
life.
But one night as she sat at her work, the lady said
use in the world. Why ca n’t I do good to
” At last, she came up with an idea.
She decided that she would keep a lighted lamp at the window for the sailors every
night. She found that ships sometimes were broken up on the rocks in the sea, since there
no lighthouse to warn them of their danger at night. Maybe her lamp would warn
The lady felt glad when the thought flashed through her mind. She found that, if she
worked late and earned money to buy the oil; and then she placed the lamp at the
She did this for five years without reward, or the hope of reward. However, good
行为) are often found out. The sailors whose lives had been saved began to send
She was happy with the thought that she was doing good. So, as long as she lived,
24. The lady decided to light the lamp for _______.
A. the sick
B. the children
C. the poor
D. the sailors
25. How could the lady pay for the lamp oil?
A. She worked one more hour each night.
B. She raised money from the sailors.
C. She got rewards from her country.
D. She sold tea and grapes to others.
26. The lady was happy because ________.
A. she got gifts from faraway countries
B. she helped many people in her way
C. the sailors gave gifts to the sick
D. the sailors found out her deeds
C
Whether we admit it or not, many of us have experienced loneliness. Last month, a painting,
me
important for me.
I like
Harry Potter
a sequel (
writing. I love it so much that I plan to go on practicing it
and writing my own stories.
survey done by US health service company Cigna found that loneliness has become a common situation in the country. It even found that young people aged 18-22 are more likely to feel lonely than the elders. Loneliness often leads to the emotions of sadness and loss, and can even “make us sick”. So, how do we deal with the pain of loneliness?
Throwing ourselves into distractions can be useful. US lifestyle writer Adrienne Breaux wrote about how she turned loneliness into a productive learning process. She used to be a terrible cook, but whenever loneliness hit her, she would buy a lot of ingredients and try out how to make them into delicious dishes. After a few months, she became good at cooking dishes she’d ne ver even made before.
This is a typical example of how loneliness gets us out of our comfort zone and allows us to grow. “When it comes to keeping loneliness at bay (控制住) , one of the best ways is to occupy your time with things that feel enriching, creati ve and exciting.” Breaux wrote, “It’s hard to feel lonely when you’re trying to master a new skill, practice a hobby or try out a new recipe.”
The attitude we choose toward loneliness is also the key to deal with it. If we see loneliness as an unwanted and annoying thing, we will suffer it. But if we admit that it’s an everyday part of life, we’ll be able to “embrace (拥抱) the beauty of our solo journey”, as best-selling US author Mandy Hale wrote in her book The Single Woman.
Instead of desperately (拼命地) finding someone to talk to or go out with, trying to have fun on our own is more practical. US Internet writer Kayla Albert shared a story of her friend, who uses her time alone to do what she really wants to do. Her friend goes out for dinner, watches movies, and visits art museums — all on her own. She claims that this kind of single lifestyle brings her joyfulness and gracefulness.
So, we can do it too. Indeed, sometimes, the best songs are the ones performed alone.
27. The survey from Cigna in Paragraph 1 tells _______.
A. when people might experience loneliness
B. how common the problem of loneliness is
C. how people deal with the pain from loneliness
D. what kind of people might suffer from loneliness
28. What was Adrienne Breaux’s solution when lo neliness hit her?
A. To keep herself in the comfort zone.
B. To get a new job being a good cook.
C. To spend time for self-improvement.
D. To relax by writing her lonely feeling.
29. What can we learn from the passage?
A. Going out with friends is better than staying alone.
B. The key to solve loneliness is to accept and enjoy it.
C. The pain of loneliness gets worse as people get older.
D. Seeing loneliness as an unwanted thing helps us avoid it.
D
No one wants to work at a messy desk and look lazy or sloppy. But does a messy desktop actually make you either of those things? Not all
disorders mean you’re out of control. Even Steve Jobs thought his
personal charm came from his messy desktop.
People who prefer a messy desk have their own ideas. Some think it makes them comfortable. A too-tidy room can sometimes make them uncomfortable, because it seems there is no place to rest their feet. Some believe it helps them concentrate more easily. Messy tables can make it easier to focus on the tasks, just like some novelists can write patiently in a noisy café. Others may be perfectionists. For those who strive for perfection, tasks are either 100% or 0% performed. Therefore, they usually put away the less important things and perform the most important ones perfectly, which leads to paper mountains on the desktop.
Many people are labeled as “sloppy” and “inefficient” because of messy tabletops. However, when we see the desks of Albert Einstein, Mark Twain and Mark Zuckerberg —pioneers of their times —things might change. Obviously, the world embraces uniformity and order; it also never refuses regular disorder, which seems like a mess but runs in an organized way.
In an experiment done by psychologist Kathleen Vohs, participants (参与者) were asked to come up with new uses for ping-pong balls. Both participants in the messy and clean offices created the same number of ideas. However, those in the messy room came up with more interesting and creative ideas. People who don’t keep a neat and tidy desktop can actually develop organizational skills and manage work and thoughts successfully, even while swamped in (淹没于) piles of books, notes and documents.
In spite of great disorder, a messy desktop presents information clearly, which can sometimes inspire us unconsciously (无意识地). Research has found people working with a messy desktop are more likely to be creative and willing to take risks, while people with a tidy one tend to follow the rules and are less likely to try new things. Vohs says, “Disorderly environments seem to inspire breaking free of tradition, which can produce fresh insights.”
But a messy desk might not be ideal all the time. When you need new ideas, a messy desk might be a good choice; but when you want to be efficient (高效的) and perform a task successfully, it seems better to make a desk clean and tidy.
No matter what kind of desk you prefer, we hope you feel comfortable and enjoy it!
30. The underlined phrase “strive for” in Paragraph 2 probably means “_____”.
A. fight for
B. is interested in
C. is afraid of
D. keep away from
31. The writer talks about the experiment in the fourth paragraph to ________.
A. encourage people to have messy desks as they like
B. explain the reasons why people like the messy desks
C. introduce a new way of being creative and interesting
D. show the influence of messy desks on people’s mind s
32. The writer probably agrees that people with messy desks might ________.
A. be intelligent and successful
B. have good behaviors and habits
C. become idea men and risk takers
D. finish the task quickly and perfectly
33. Which of the following would be the best title for the passage?
A. Messy Desk: Do People Need to Change It?
B. Messy Desk: Do People Find Excuses for It?
C. Messy Desk: Does It Make People Comfortable?
D. Messy Desk: Does It Help People Work Efficiently?
四、阅读短文，根据短文内容回答问题。（共10分，每小题2分）
IG, a Chinese esports club, won the world championship title in LOL (League of Legends) in 2018. It beat European team 3:0 in South Korea. It was the first time that a club from China’s LPL (League of Legends Pro League) won the title in the world championship’s eight-year history. So what is esports?
Esports (Electronic Sports) is a form of competition using video games between professional players. It is not only a simple game in a sense, but a sport in which players use electronic equipment to play against each other in intelligence. It can improve the players’ thinking ability, heart-to-eye coordination (协调), willpower and develop team spirit.
In 2003, esports became the 99th sport in China. However, esports is different from traditional sports and online games. Traditional sports athletes mainly train their physical ability and skills, such as muscle memory, exercising and dieting; while esp orts athletes’ training is mostly about the mind, such as studying strategies (策略) and new updates for the game.
The industry has been developed for more than 10 years, but the public usually hold the opinion that playing online games has no benefit but ta king one’s attention away from their duties. In fact, there are several differences between esports and online games：
●First, the basic features. Online games are entertainment games while esports
is a sport. Esports is an intellectual competition between people in an organized environment created by information technology.
●Second, the game rules. Esports has clear game rules. Its biggest feature is
strict time and round limitations. However, online games are lack of clear rules of the game. Without time lim it, it’s easy for people especially teenagers to be addicted to (沉迷于) it.
●Third, the sports spirit. Esports competitions between athletes pay great
attention to fair sports spirit. Some online games only need to recharge (充钱) to gain advantages, which is the main difference between esports and online games.
In the upcoming 2022 Asian Games to be held in Hangzhou, esports will officially become a medal event. Esports is a new sporting activity. It will take a long time to grow into a mature industry like NBA (the National Basketball Association of the US). Let’s have a better understanding of esports and expect its bright future.
34.Which club won the world championship title in LOL in 2018?
35.What is esports?
36.When did esports become the 99th sport in China?
37.What is esports athletes’ training about?
38.What is the passage mainly about?
书面表达（共10分）
五、文段表达（10分）
39. 从下面两个题目中任选一题，根据中文和英文提示，完成一篇不少于50
词的文段写作。文中已给出内容不计入总词数。所给提示词语仅供选用。请不要写出你的校名和姓名。
假如你是李华，你打算邀请你们班的英国交换生Peter 周末去老舍茶馆体验中国的茶文化。请用英语写一封电子邮件，告诉他见面的时间和地点，体验茶文化的原因，以及他需要做的准备。
提示词语：invite, Laoshe Teahouse, history, many kinds, learn 提示问题：● When and where will you meet?
● Why are you going to experience Chinese tea culture? ● What do you advise Peter to prepare for it?
“滴水之恩，涌泉相报”。感恩、回报是中华民族的传统美德。面对他人的帮助，多一份感恩与回报，生活就会多一缕阳光。
某英文网站正在开展以“感恩他人”为主题的征文活动。假如你是李华，请用英
语写一篇短文投稿，谈谈生活中谁曾经帮助过你，他（她）是怎样帮助你的，以及你打算怎样做来回报他（她）。
提示词语：trouble, sad, encourage, look after, in return (作为回报) 提示问题：
● Who helped you a lot? ● How did he/she help you?
● What are you going to do in return?
丰台区2018-2019年学年度第一学期期末练习
初三英语试卷参考答案
知识运用
一、单项填空
1.B
2.A
3.C
4.B
5.C
6.D
7.C
8.B
9.A 10.D 11.D 12.A
二、完形填空
13.A 14.B 15.D 16.B
17.C 18.D 19.C 20.A
阅读理解
三、阅读短文，选择最佳选项。
21.A 22.C 23.D 24.D 25.A 26.B 27.B 28.C 29.B 30.A
31.D 32.C 33.A
四、阅读短文，回答问题。
34. Club IG./ A Chinese esports club.
35. Esports (Electronic Sports) is a form of competition using video games
between professional players.
36. In 2003.
37. It’s mostly about the mind (such as studying strategies and new updates for
the game).
38. What is esports; the differences between esports and online games.
书面表达
五、文段表达
39.参考范文：
Dear Peter,
How is it going?
I know you like Chinese culture so I’d like to invite you to experience Chinese tea culture with me. Shall we meet at Laoshe Teahouse at 9 o’clock this Sunday morning?
As you may know, Chinese tea culture is very famous, which has a long history. There are many kinds of tea in China, such as green tea, black tea, white tea and so on. If you are interested in them, you can learn about them online. Maybe you can find your favourite to have a try.
Yours,
The person I thank most is my friend Tina.
Once I failed a singing competition and felt very upset. I was crying in the corner of the hall when Tina came to me. She handed me a piece of tissue and hugged me tenderly. She kept comforting me till I stopped crying and encouraged me. From her words, I became calm and found confidence again.
I was very thankful for what she did and decided to practice harder for the next competition. As her good friend, I will be with her whenever she needs me.
九年级英语上学期期末考试试卷分析 一、试题评价 本次试卷是120分的。试卷总体来说，难度适中。本次命题在考察学生英语基础知识的前提下，注重了对学生语言综合能力和知识迁移的考察,注重语言环境及文化背景的设置，减少了词汇、语法等单纯知识性的试题，增加了试题的灵活性、开放性、探究性及综合性。试题以听、读、写的形式，全面地检查了学生应掌握的英语基础知识和基本能力。 总体来说本套试题能够较全面地考核本册书的知识点，既考学生的基础知识，又考学生的能力，尤其是灵活的应变能力。从下面的数据分析看，本次考试成绩不是很理想。 二、数据统计分析： 三、学生对各题得分情况分析： 1.听力部分：此题考察学生是否能正确理解所听的内容，并具备用英语进行释义的能力，用英语回答问题的能力，在特定的语境中进行交际的能力。听力部分共六小节，设计由浅入深,由易到难,循序渐进,从知识到能力,具有一定的梯度,对于基础较好的学生来说，此套听力题略显简单，大部分都在20-28分之间。对有一定英语基础，但掌握不扎实的学生来说，听力还存在薄弱的环节。另外学生除了对听力的训练不够，答题的方法和技巧也掌握的不是很好。对于英语学习吃力的学生来说，听力是相当难的，成绩也很不理想。 2.笔试部分的基础知识题占三分之一以上，能力题占三分之二左右。此题注重考察词的辨析、语法以及习语等语言知识，在特定的语境中运用语言知识进行交际能力。此题知识覆盖面较广，重点、难点比较突出。 3.笔试中的补全对话共两段，这是由对话组成的两篇短文，对话语境不完整，试题要求学生在通读对话和掌握大意的基础上，用完整的语言补全对话，使其意思完整。题中的第一个对话，语境相对完整一些，学生答的相对较好。但第二个对话，语境虽然清晰,但学生不注意时态,语态的变化,失分较多。 4.笔试中的阅读理解，此题考察学生是否具备根据上下文猜测词意进行推理等思维活动，识别选择归纳所提供的信息，探索语篇中的表层含义和深层含义的阅读能力，从而达到获得正确的语言信息的目的。 5.笔试中的书面表达：第一篇内容比较简单，学生完成的较好。第二篇作文所涉及内容和学生的日常生活有着极大的关系,学生写的时候不觉的费力。但个别同学在语言的灵活应用上欠功夫，不能够把书上的语言恰当的运用到自己的作文中去,且中式英语较重, 语言表达不地道,语法错误较多。这说明学生在日常写作教学中我们还存在着问题，没能在很好的驾御教材的同时注重学生能力的培养。 四、今后教学方法方式及其建议
初三化学上学期期末考试试卷及答案 （满分100分，考试时间100分钟） 班别姓名学号成绩 可能用到的相对原子质量：H—1 O—16 C—12 一、选择题（每小题只有一个正确答案，把正确答案序号填入下表。每小题2分，共40分） 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ）A．分子是不断运动的B．分子是由原子组成的 C．分子具有一定的质量D．分子之间有一定的间隔 2. 下列变化中，属于化学变化的是（） A. 汽油挥发 B. 矿石粉碎 C. 蜡烛燃烧 D. 铜丝弯曲 3. 下列物质在氧气中燃烧，火星四射，生成黑色固体的是（） A. 镁条 B. 红磷 C. 木炭 D. 铁丝 4. 地壳中含量最多的金属元素是（） A. O B. Si C. Fe D. Al 5. 下列物质中，属于混合物的是（） A. 氧化铜 B. 空气 C. 氢气 D. 氯化钾 6. 称量固体药品时，需要用到的仪器是（） A. 托盘天平 B. 玻璃棒 C. 酒精灯 D. 温度计7．在饮用水中添加含钙、镁、锌、硒的矿物质，可以改善人体营养，增强体质。其中“钙、镁、锌、硒”是指( ) A．分子B．原子C．离子D．元素 8．某同学做物质在氧气中燃烧的实验方法如下图所示，其中不合理的是（） A．木炭在氧气中燃烧B．铁丝在氧气中燃烧C．硫在氧气中燃烧D．蜡烛在氧气中燃烧 9．为形象展示水分解的微观过程，某同学制作了一些模型，表示相应的微观粒子。其中表示水分解过程中不能再分的粒子是（）
①② ③ A．B．C．D． 10．右图是老师放置在实验桌上的三瓶无色气体，它们可能是H2、O2、CO2。下列关于这三种气体的鉴别方法中，不正确 ．．．的是（） A．根据瓶③倒置，可判断瓶③存放的是H2 B．用带火星的木条放入①中，若复燃，则存放的是O2 C．用点燃的木条伸入②中，若火焰熄灭，则存放的是CO2 D．向②中加入少量蒸馏水，若变为红色，则存放的是CO2 11．下列关于稀有气体的叙述中,错误的是（） A．曾被称为惰性气体B．都不能与其他物质发生化学反应 C．都是无色无味气体 D．稀有气体有广泛的用途 12.宣传科学，揭露伪科学，是中学生的义务。从科学的角度分析，下列信息中合理的是( ) A.燃放鞭炮，能驱鬼降魔，对空气不会造成污染 B.某机构声称发明了一种催化剂，可使水变成燃油 C.普通的水由“大师”点化便成为“圣水”，饮之可逢凶化吉 D.原子弹的爆炸，是利用了原子核变化时放出的巨大能量 13、下列图示中的有关实验操作正确的是（） A B C D 14．三聚磷酸钠(Na5P3O10)过去常用作洗衣粉的辅助剂，我国部分省市为防止水体富营养化已止销售和使用含磷洗衣粉。在Na5P3O10中磷元素的化合价为（） A．+3 B．+4 C．+5 D．+6 15．下列有关实验室用高锰酸钾制取氧气的叙述，错误的是（） A.装有高锰酸钾的试管，在加热时试管口要略向上倾斜 B.实验前要检查气体发生装置的气密性 C.若用排水法收集氧气，在实验完毕后，先将导管移出水面再熄灭酒精灯 D.收集满氧气的集气瓶，盖上玻璃片并正放在桌面上 16.据新华社报道，今年4月15日，重庆天原化工厂连续发生氯气(Cl2)泄漏，造成严重的环境污染，随后冷凝器中的氯化氮(NCl3)发生多次爆炸。该事件导致多人中毒、伤亡，15万人被疏散，造成 重大损失。从化学角度看，下列说法中，不符合科学性 ．．．．．．的是( ) A.氯气是一种有毒的气体 B.三氯化氮的化学性质非常稳定 C.三氯化氮中正负化合价代数和为零 D.化工厂不应建在人口密集的居民区
初三英语期末考试 时间：100分钟满分：130分 听力部分（20分） 一、听问题，选答案。读一遍。（5分） ( )1. A. Once a year. B. For a long time. C. Next year. ( )2. A. That’s right. B. Good idea. C. No, I don’t. teacher. ( )3. A. In his office. B. Very funny. C. He’s a ( )4. A. No. don’t say so.B. Thank you. C. We’d love to. ( )5. A. No, not at all. B. Yes, please open it. C. No, don’t open it, please. 二、听对话。选出最佳选项。读一遍。（5分） ( )1. How will the woman get to the railway station? A. By bike. B. By car. C. On foot. ( )2. How old is the man now? A. 22 years old. B. 24 years old. C. 26 years old. ( )3. Where are they talking? C. On the phone. A. In the classroom. B. At the girl’s home. ( )4. When is it now? A. In the evening. B. In the afternoon. C. In the morning. ( )5. When did Mike go back home last night? A. At 8:45. B. At 9:15. C. At 9:45. 三、听第3段材料，选出最佳选项。读两遍。（10分） ( )1.Wen did Mr. Smith’s friend give him a cat? A. two months ago B. one month ago C. two weeks ago D. one week ago ( )2. Mr. Smith asked his cook to give to his cat every day. A. a piece of cake B. a pound of fish C. a pound of meet D. a bowl of rice ( )3. Mr. Smith didn’t believe his cook because . A. the cat was becoming thinner and thinner. B. the cat wanted to run away. C. he didn’t like him. D. he wanted to prove. ( )4. Mr. Smith got the cat from . A. his friend B. the market C. the street D. the house ( )5. From the story, we know ate the meat. A. Mr. Smith B. the eat C. the cook D. Nobody 听下面的短文。短文后有5个小题，从题中所给的A、B、C三个选项中选出最佳选项。短文读两遍。 6. What did David do well in when he was young? A、Basketball. B、Football. C、Tennis 7．Why did he stop playing football? A、Because he didn’t like it at all. B、Because he went to work in a city. C、Because there was no team. 8．What happened to David then? A、He was badly ill. B、He began to get fat. C、He got stronger and stronger. 9．What did he decide to do then? A、To play tennis.
2015-2016学年度第一学期期末考试化学试卷
九年级化学期末试卷第2页（共4页） 2015-2016年学年度第一学期期末考试 九年级化学试卷 题 号 一 二 三 四. 总分 得 分 可能用到的相对原子质量：H ：1 O ：16 C ：12 N ：14 S ：32 Cl:35.5 Zn:65 Cu:64 评卷人 得 分 一、选择题（每题2 分，共40分） 1. 下列物质的用途中，利用其化学性质的是 【 】 A. 干冰用于人工降雨 B. 天然气用作燃料 C. 液氮用作冷冻剂 D. 银用于制作导线 2. 生活中属于溶液的是 【 】 A.草莓酱 B.蒸馏水 C.蔗糖水 D. 玉米糊 座 号
3. 要配制100g 5%的NaCl溶液，除了需要托盘 天平和量筒外，还需要用到的一组仪器是【】 A.烧杯、试管、玻璃棒 B.烧杯、胶头滴管、玻璃棒 C.烧杯、胶头滴管、漏斗 D.烧杯、酒精灯、玻璃棒 4. 下列各项实验中，所用试剂及实验操作均正确的是【】 A.制取CO2 B.加热固体 C. 制取氧气 D.除去O2中的水蒸气 5. 下列说法正确的是【】 A．木炭燃烧后生成红色固体B．一氧化碳在空气中燃烧发出蓝色火焰 C．红磷在空气中燃烧产生大量白雾D．铁丝伸入盛有氧气的集气瓶中剧烈燃烧 6.分类是学习和研究化学的常用方法。下列物质分类正确的是【】A.有机物：甲烷、二氧化碳 B.化合物：双氧水、水银 C.混合物：氯酸钾、冰水共存物 D.氧化物：水、二氧化锰 九年级化学期末试卷第3页（共4页）
7. 关于电解水实验的说法中正确的是【】 A.实验证明水是由氢气和氧气组成的 B.电解水时在正极产生氧气 C.水中氢氧元素的质量比为2 ：1 D.水分子是由氢分子和氧原子构成的 8. 地壳中和人体中含量最多的元素是 【】 A.O B.Si C .Al D Fe 9. 铯原子钟300年误差不超过5秒．铯元素在周期表的信息如图，下列说法正确的是【】A.铯元素属于非金属元素 B. 铯原子的质子数是55 C.铯元素符号为CS D.铯原子的相对原子质量为132.9g 10. “塑化剂”是一种工业原料，但不法商人把它添加到饮用品当中，对人的身体造成严重危害。已知“塑化剂”的主要成分是邻苯二甲酸二辛酯，化学式为C24H38O4，有关邻苯二甲二辛酯说法错误的是 【】 A. 它是一种有机物 B. 一个邻苯二甲酸二辛酯分子中共有66个原子 九年级化学期末试卷第4页（共4页）
初三英语期末考试试卷 一、听力选择(满分26分) A)对话理解(共16小题；每小题1分，满分16分) 听下面16段对话。每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳项。每段对话读两遍。 1．What does the man want to drink? A．Black coffee．B．White coffee C．Tea with milk． 2．How long has Jack been in the school? A．For two years．B．Since two months ago．C．Two years ago． 3．How did Alice go to school? A．By bicycle．B．On foot．C．By bus． 4．Where does this conversation take place? A．At a restaurant．B．At a theatre．C．At the station． 5．How much does the man need to borrow to buy the coat? A．$5 B．$10 C．$11． 6．What is David going to do? A．Catch a train home．B．Do his homework．C．Go to apark． 7．What did the man mean? A．He was badly hurt．B．He was safe．C．He couldn’t see． 8．What was the weather like yesterday evening? A．Rainy．B．Sunny．C．Cloudy． 9．In which month did Tom’s father go to Japan? A．January．B．Febmary．C．March． 10．What is the probable relationship between the two speakers? A．Teacher and student．B．Classmates．C．Mother and son． 11．What did the woman do with today’s newspaper? A．Sheuseditto cook． B．She cleaned the doors with it． C．She cleaned the windows with it． 12．What is the man? A．A policeman．B．A writer．C．A robber． 13．Where does the man prefer to live? A．In the city．B．In the country．C．Anywhere。 14．Where did the man meet Jack? A．At the man’s sister’s birthday party．
2013-2014学年湖北省孝感市汉川市九年级（上）期末数学试卷 、选择题（共12小题，每小题3分，满分36 分） 2. （ 3分）（2013?烟台）以下是回收、绿色包装、节水、低碳四个标志，其中是中心对称图 形的是（ ） 2 3. （ 3分）（2013秋？汉川市期末）方程（x - 3） =0的根是（ ） A . x 仁-3, x 2=3 B . x 1=x 2=3 C . x 仁x 2= - 3 D . x 1 =占,x 2= - ^3 4. （ 3分）（201^秋？龙湖区期末）下面计算正确的是 （ _） _ A H ■■■/■： B . .1 二二 ‘‘ C .二？二=匸 D . 5. （3分）（2013秋？汉川市期末）如图，O O 是Rt △ ABC 的内切圆，/ C=90 °若AC=12cm , BC=9cm ，则O O 的半径（ ） A . 3cm B . 6cm C . 9cm D . 15cm 6. （ 3分）（2013秋？汉川市期末）下列事件是随机事件的是（ ） A .水中捞月 B .风吹草动 C .守株待兔 D .翁中捉鳖 7. （ 3分）（2013秋?汉川市期末）有A , B 两只不透明口袋，每只口袋里装有两只相同的球， A 袋中的两只球上分别写了 细”、心”的字样，B 袋中的两只球上分别写了 信”、任”的字 样，从每只口袋里各摸出一只球，能组成 信心”字样的概率是（ ） & （ 3分）（2009?崇左）已知点 A 的坐标为（a , b ） , O 为坐标原点，连接 OA ，将线段OA 绕点O 按逆时针方向旋转 90。得OA 1,则点A 1的坐标为（ ） A . （- a , b ） B . （a , - b ） C . （- b , a ） D . （b ,- a ） 1.（ 3分）（2011?上海）下列二次根式中，最简二次根式是（ A . D .
初中英语期中考试试卷分析 目前我市使用了两个版本的初中英语教材：仁爱英语和新目标英语。仁爱英语命题的目的是了解学情；新目标英语命题的目的是进行教学质量调查。两者命题有一个共同点：实现新课程要求的三维目标，传道（情感、态度、价值观）、授业（引导学生掌握知识和技能）、解惑（引起主动学习，学会学习方法）。 一、试卷特点： 1.试卷注重基础，体现灵活运用，难度和区分度恰当无偏题、怪题出现。 试题注重考查学生在一定语境下对语言基础知识的掌握情况和综合运用英语的能力。语言基础知识的考查重点突出、覆盖面广；情景设置合理，避免了纯知识性的死记硬背题；词汇和语法的测试充分注意了语言的真实性、趣味性和实践性；注重语感，灵活性强，突出语言形式向语言意义的转化。 2．试题从知识立意逐渐向能力立意转变。 加大了能力考查的比重。试题突出了语言的交际性，强调在特定的语境中英语知识的灵活运用。适当增加了测试词汇量，加强能力检测。如阅读理解考查的内容注重了对学生在语境中运用语言能力的考查。加大了对语言的熟练程度和深层次能力考查的力度。如“阅读理解”部分注重了对归纳，推断和猜测整个句子等深层次能力的考查。阅读材料贴近生活，同时题材广泛，体裁多样、生动有趣，并富有思想性。淡化语法，强调能力。语法知识的测试充分注意了语言的真实性和实践性。纯知识性的试题的比例减少到最低限度，命题者通过设置不同的语境，把对语言知识的考查中心放到了根据上下文中和一定的语境中，让语法测试试题具有更积极和更现实的意义，能更多地体现语言的交际功能。 3．书面表达难度控制合理。 书面表达给学生留有充分发挥能力的空间，加大了考查学生综合运用语言能力的力度，使试卷更具现实性。书面表达题对初中英语教学有着良好的导向作用，要求学生要充分运用所学语言记录自己的真实情感，进一步体现了英语学科的交际性和工具性。 二、七年级英语试卷分析及教学建议 本次期中考试，七年级英语试卷题量适度、难易适宜，试题大部分都是基础题。从总体上说，试题出题范围很合适，适合七年级学情。对学生来说，只要细心，就会得高分。 第一题听力部分 本题满分为20分，得分率为60%，是本次考试失分最多的一道题，如听力IV,听对话，选答案，共5道小题，大部分学生只能做对一、两道题，究其原因，是学生听力训练少、考试经验不足所致。 第二题单项选择 本题共15分，得分率为86%。本题为基本题型，学生失分较少，不过，学生因语法知识欠缺，导致的问题还是显而易见的。如3. I am from Canada. ____ from the U.S.A. 学生知道应该填I am not,但试卷没有该选项，而是巧妙地提供了I’m not这个选项，学生不知道am和not没有缩写形式，大多选了B这个错误选项。5题中different后应跟名词复数这一点大部分学生也不知道。类似的语法点教师以后应该强调到。 第三题句型转换 本题共5分，学生平均只得了3分。问题多出在助动词do和does没有掌握好。 第四题补全对话 本题共10分，得分率在95%左右。这道题老师指导的不错，学生答的也不错。
九年级第一学期化学期末考试卷附答案 可能用到的相对原子质量：H 1 C 12 N 14 O 16 P 31 Ca 40 Cu 64 第Ⅰ卷（选择题 共36分） 一、选择题（本题包括15小题，每小题2分，共30分。每小题只有一个选项符合题意） 1. 2011年诺贝尔化学奖被授予以色列科学家丹尼尔·谢赫曼，以表彰他在发现准晶体方面所作出的突出贡献。准晶体可能具有下列性质，其中属于化学性质的是： A ．密度低 B ．耐磨损 C ．导电性差 D ．抗氧化性强 2. 下列实验操作正确的是： 3. 谚语诗词中蕴含着科学道理。下列说法正确的是： A.“真金不怕火炼”是说黄金熔点很高 B.“众人拾柴火焰高”是指可燃物越多，则着火点越低，越容易着火 C.“百炼成钢”与“只要功夫深铁杵磨成针”蕴含的化学原理相同 D.“ 水滴石穿”包含有化学变化 4．下列判断正确的是： A ．双氧水属于单质 B ．不锈钢属于纯净物 C ．干冰属于氧化物 D ．P 4属于化合物 5. .用分子观点解释右图漫画中小女孩的话，正确的是： A.分子质量小 B.分子间有间隔 C.分子体积小 D.分子在不断运动 6.将“神舟八号”飞船送入太空的是“长征二号”F 运载火箭，火箭工作中发生 的反应为C 2H 8N 2 + 2R == 3N 2 + 4H 2O + 2CO 2 ；其中R 的化学式是: A ．N 2O 4 B ．NO 2 C ．N 2O D ．CH 4 7、下列符号表示正确的是： A ．2个氮分子：2N B ．2个碳酸根离子：2CO 32—﹣ C ．氧化铝中铝元素的化合价： 3Al 2O 3 D ．4个氢原子：2H 2 8.今年，我省出现旱情，部分地区水资源紧缺。有关部门呼吁，人人都应该树立保护水资源的意识，养成节约用水的习惯。下列节水措施中不正确的是： 我又在 被动吸烟！
2012暑期初二升初三英语期末测试卷 满分：150分时间：80分钟 姓名：得分：___________ 题号I II III IV V VI VII VIII IX X XI I 卷 II 卷 得 分 说明：本试卷分第I卷和第II卷两部分。 第I卷（满分100分） 一、听力部分（10分） Ⅰ. 根据你听到的句子，选出与所听内容相符的图片。每个句子读两遍。（5分） 1. ______ 2. _______ 3. ______ 4.__________ 5. ______ II. 听独白，选择正确的选项，完成表格。（5分）
animals from how koala6_____________ beautiful 7___________ Africa friendly 8___________ South Pole9_____________ panda10_____________ cute （）6. A. Canada B. Australia C. France （）7. A. elephants B. tigers C. dolphins （）8. A. lions B. penguins C. pandas （）9. A. lovely B. cute C. funny （）10. A. China B. Japan C America 二笔试部分（90分） III．单项选择题。(30分，每个1分) （）11. ---Where’s Li Hua from? ---He is from______. A. China B. American C. English D. Japanese （）12. ——____ do they think ____ the books? ——They love them. A. How, for B. What, for C. What, of D. How, of ( )13. ——How were the people there? ——____ unfriendly. A. They are B. They were C. He is D. She was ( )14. ——Do you want to watch this video? —— No, I think it’s ____. Let’s go to the movies. A. boring B. interesting C. exciting D. funny ( )15. We like koalas because they’re ____ cute. A. kinds of B. a kind of C. kind of D. a kind ( )16. There’re three _____ in the office. A. polices B. policeman C. policemen D. policewoman （）17. Don’t ____ late for school. —— Sorry, sir. A. arrived B. arrives C.arriving D.arrive ( )18. ——How was the weather? ——____. A. It was sunny. B. It’s sunny C. They are fine. D. Not OK ( )19.Where are the boys? —— Look! They _______ the flowers. A. are water B. is watering C. are watering D. are watered ( )20. ——____? ——I’d like a dessert. A. What would you like B. What does you like C. Would you like D. What you would like
应用文写作基础期末试卷 第1页 共4页 应用文写作基础期末试卷 第2页 共4页 ---------------------------- - --- ------------------------- 隆德县职业中学2015－2016学年度第一学期理论考试 高二（2）班幼儿园科学教育期末试卷 （命题人：张丽萍 考试时间：120分钟，满分：100分，共六大题） 一、多项选择题（每题2分，共10分） 1. 幼儿园科学教育的具体方法包括观察法、实验 法、（ ）。 A.制作法 B.展示法 C.讨论法 D.游戏法 2．生活中的科学教育活动的特点是 ( ) A.寻常性 B.真实性 C.松散性 D.灵活性 3. 集体教学活动的结构可以简化为三部分：（ ） A. 开始部分 B. 展开部分 C. 结束部分 D.导入部分 4.按照观察对象的性质，可将观察认识型活动可分为（ ） A. 物体观察 B. 现象观察 C. 个别观察 5．教师指导生活中的科学教育活动的要求是（ ） A. 随机开展 B. 不求同步 C. 互动跟进 D. 持续探究 二、填空。(每空1分，共25分。) 6、观察认识型活动的四种典型设计思路是（ ）、（ ）、（ ）、（ ）。 7、科学讨论型活动作为一种（ ）学习形式，主要适用于那些不易通过直接的探究进行学习的科学内容，所以适合于（ ）班幼儿。 8、科学讨论型活动不能把幼儿的（ ）活动和他们获取经验的（ ）活动孤立开来。 9、技术操作型活动中涉及的最重要的教学目标是（ ）。 10、技术操作型活动可以具体地划分为以下两种活动：（ ）活动和（ ）活动。 11、从区角科学教育活动的特点来看，幼儿自主学习（ ）（多或少），教师直接干预（ ）（多或少）。 12、在区角科学教育活动过程中，幼儿扮演（ ）和（ ）的双重角色。教师通过材料的设计对幼儿施加影响，是（ ）的指导者。 13、（ ）是幼儿园科学教育的基本方法。 14、幼儿生活中的各种活动――（ ）、（ ）、（ ）等都是进行科学教育的有效途径。 15、区角活动通常有三种形式：（ ）区角、（ ）区角和集体教学中的区角。 16、每次科学发现室的活动一般在（ ）分钟左右。 17、在幼儿园科学教育实践中，我们应遵循以下的原则：动手操作原则、 （ ）原则、支架原则、联系生活原则、( ) 原则。 三、辨析题（先判断正误，再进行分析，每题3分，共9分） 18、主动探究等同于“动手做”。（ ）
2017-2018学年度第一学期期末测试九年级试卷分析洪山镇洪山九年制学校李品艳 一、试卷的基本情况分析 本次考试卷主要考查的是人教版九年级上教学内容，注重考查英语基础知识和基本技能，又强调学生在实际中运用英语的能力，所涉及的知识点的面比较广，题目设计比较灵活。试卷只有有笔试部分，没有停留，共八大题型（单项选择、完形填空、阅读理解、完成句子、短文填空、任务型阅读、补全对话、作文），总分120分，考试时间为120分钟。 本次试卷难度不大，学生各题型大体情况综述如下。 1，单选题注重考查课本所学单词及语法知识，难度不大。 2，完形填空。二篇完形填空难度适宜，和平时所练题型难度相当。 3，阅读，整体难度不大，注重细节考察，主要是考察信息提取能力。 4，完成句子，所考内容都是讲过的，但是学生错误不断。 5，补全对话，特别是第二个补全对话得分率极低，基础不牢。 6，最后是作文，本次作文是描写自己为考试准备，目的在于考察学生对第一单元所学内容的运用，题干中给出了提示句子，相对降低难度，而且此类型是写过讲过练过的，大部分同学都能动笔写，都能得到相应分数，优秀生本次作文写得较好。 7，本次试卷命题有以下几个导向： 8，1.九年级英语课堂教学中应重视基础知识的积累和听、说、读、写技能的训练，紧抓课本知识的学习巩固与训练。 9，2.要注重培养学生学习习惯--课前预习、准备习惯，课中听课、做笔记、合作探究的习惯； 10，3.课堂教学中要面向全体学生，紧抓优等生，不放弃后进生，师徒结对、小组合作互助，整体提高，减少两极分化。 11，二、存在问题及原因分析 12，（一）老师方面 1、重在抓新课学习，没有复习。 2、作业布置到位，督促检查不够到位，还需多加强对学生学习方法的指导. 3，学生的分组合作和师徒结有一定的学习效果，教师还需进一步加强对组长和师傅的指导，积极发挥师傅的带头引导作用。 （二）学生方面 1、学习基础差，学习成绩两极分化严重，学习自信心不足，容易自暴自弃。 2，大部分同学学习缺乏主动性，几乎很少有学生能主动学习英语，英语学习兴趣不足。 3，大部分学生懒惰，不能自主完成学习任务，作业拖拉，爱抄袭作业。 4，大部分学生没有良好的学习习惯，不能很好完成预习、复习任务，课堂中学习注意力不集中，需不断提醒才做笔记，有些人提醒也不动，他们独立完成作业情况更不容乐观。 5、学生晚上睡眠不足，白天爱打瞌睡，学习效率低下。 三、今后英语教学改进措施 １、英语教学应该抓好课本基本知识学习和巩固，加强答题技能训练。
一、选择题（每小题只有1个选项正确。每小题2分） 1．下列过程中需要通电才可以进行的是： ① 电离 ② 电解 ③ 电镀 ④ 电化学腐蚀 A ．①②③ B ．②③ C ．②③④ D ．全部 2．在蒸发皿中蒸干下列物质的溶液，不能得到该．物质固体的是： A ．Fe 2(SO 4)3 B ．MgCl 2 C ．K 2CO 3 D ．NaCl 3．为了除去MgCl 2酸性溶液中的Fe 3+ ，可在加热搅拌的条件下加入一种试剂，过滤后，再加入适量的HCl ，这种试剂是： A ．NH 3·H 2O B ．NaOH C ．Na 2CO 3 D ．MgCO 3 4．能使水的电离平衡正向移动，而且所得溶液呈酸性的是____________ A ．将水加热到100℃时，水的pH=6 B ． 向水中加入少量明矾晶体 C ．向水中滴加少量NaHCO 3 D ．向水中滴加少量稀硫酸 5．A 、B 、C 、D 4种金属，将A 与B 用导线连接起来，浸入电解质溶液中，B 不易腐蚀，将A 、D 分别投入等浓度盐酸中，D 比A 反应剧烈，将铜浸入B 的盐溶液里，无明显变化，如果把铜浸入C 盐溶液里，有金属C 析出，据此判断它们的活动性由强到弱顺序是： A ．D>C>A>B B ．D>A>B>C C ．D>B>A>C D ．B>A>D>C 6．下列各图的水槽中盛装的是海水，其中铁被腐蚀的得最慢的是： 7．25℃时，某NH 3·H 2O 与HCl 溶液混合后，测得溶液的pH=7，则溶液中下列关系正确的是： A ．c (NH 4+ )>c (Cl ˉ) B ．c (NH 4+ )=c (Cl ˉ) C ．c (NH 4+ ) 人教版英语精品资料（精修版） 腾五中上学期期末考试试卷 初三英语 (满分100分，时间120分钟) 所有试题均在答题卡上作答 第一部分听力(共四节，满分25分) 第一节听句子，选出与句子内容相关的图画，并将所选答案的字母代号填入题前括号内。每个句子听两遍。(共5小题；每小题1分，满分5分) 第二节听句子，选出与所听句子内容相符的正确答语，并将所选答案的字母代号填入题前括号内。每个句子听两遍。(共5小题；每小题1分，满分5分) （）6. A. Father Christmas. B. Last week C. With my family. （）7. A. Why not? B. He isn't ten. C. Yes, I did. （）8. A. Steel. B. In America. C. $34. （）9. A. Yeah. He's creative. B. On the table. C. It is mine. （）10. A. In ten years. B. We can make a plan first. C. I want to be a doctor. 第三节听对话，选出能回答问题的正确选项，并将其字母代号填入题前括号内。每段对话听两遍。（共10小题，每小题1分，满分10分） 听第一段对话，回答第11—12小题。 （）11. What is the white blouse made of?. A. Cotton. B. Silk. C. Wool. （）12. How much is the blue blouse? A. 200 yuan. B.175 yuan. C. 75 yuan. 听第二段对话，回答第13—14小题。 （）13. How soon will the speakers leave their school? A. In one month. B. In two months. C. In three months. （）14. Where does Lucy want to work in the future? A. In a hotel. B. In a hospital. C. In a school. 听第三段对话，回答第15—17小题。 （）15. What will the speakers do on Sunday?. A. Go to a park. B. Go to a zoo. C. Go swimming. （）16. What will the weather be like? A. Cool. B. Hot. C. Warm. （）17. When will the speakers meet on Sunday? A. At 8:00 am. B. At 9:00 am. C. At 10:00 am. 听第四段对话，回答第18—20小题。 第1页 共3页 装 订 线 卢龙职教中心 2016 — 2017 学年度第 一学期期末 考试（科目） 数学 试卷 应用班级： 15学前（1） 、 15 财会（1） 姓名： 班级： 考号： 考试时间90分钟 满分120分 注意事项： 1.本试卷分选择题、填空题和解答题三部分. 2.答题前，考生务必将自己的信息写在试卷相应的位置. 3.考试结束后，试卷必须及时上交. 一、选择题（共10个小题，每小题4分，共40分.每小题所给的四个选项中，只有一个符合题目要求） 1.tan690°= （ ） A.3 B.-3 C. 3 3 D.-3 3 2.已知角α终边经过点??? ? ??-22,21，tan α的值是 （ ） A. 2 1 B. 22- C. 2- D. 23- 3．已知5 3 sin =α,且是第二象限的角，则αtan 的值等于 （ ） A. 34 B. 43 C. 43- D. 4 3± 4.以下四个数中，是数列{n(n+1)}中的一项是 （ ） A. 17 B. 32 C. 39 D.110 5.在等差数列{}n a 中，已知 363 =s ，则=a 2 （ ） A. 18 B. 12 C. 9 D. 6 6.若f （x ）是周期为π的奇函数，则f （x ）可以是 （ ） A.sinx B.cosx C.sin2x D.cos2x 7.将函数sin y x =的图象向左平移(02)??π≤≤个单位后，得到函数sin(6 y x π =- 的图 象，则?等于 （ ） A. 6 π B.76π C.116π D.56π 8.在等比数列{}n a 中，已知 22 =a ，65=a ，则=a 8 （ ） A. 10 B. 12 C. 18 D. 24 9.在?ABC A B A B 中，··sin sin cos cos ,<则这个三角形的形状是 （ ） A ．锐角三角形 B ．钝角三角形 C ．直角三角形 D ．等腰三角形 10.函数x x y 2cos 32sin -= 6 6 (π π ≤ ≤- x 的值域为 （ ）A. []2,2- B. []0,2- C. []2,0 D. ]0,3[-二、填空题(共8个小题，每小题3分，共24分.请将最后正确结果填在对应的横线上，不填、填错不得分) 11.函数y=sin2x+1的最小正周期为 12.若?? ? ??- ∈0,2πα，则()ααcos ,tan P 位于第 象限 13.若)tan(,2 1 tan ),2(53sin βαβπαπα-=<<= 则的值是 14.将函数?? ? ? ? - =3sin πx y 的图象上所有点的横坐标伸长到原来的2倍（纵坐标不变），再 将所得的图象向左平移 3 π 个单位，得到的图象对应的解析式是 15.已知等差数列{}n a 中，31=a ，d=2,则=6s 监利县2009—2010学年度上学期九年级化学期末训练题（三） 班级姓名分数 有关相对原子质量 C—12 O—16 H—1 Cl---35.5 Ca---40 Mg---24 一、选择题（每小题1分，共14分。每小题列出的四个选项中，只有一个选项符合题意，请将其代号选出，并填入题后的答案栏内.） 1．创立奠定近代化学基础的是 A、会制造劳动工具 B、发现和利用了火 C、原子论和分子论的创立 D、元素周期律和元素周期表的发现 2．古诗词是古人为我们留下的宝贵精神财富。下列诗句中涉及物理变化的是 A.野火烧不尽，春风吹又生 B.春蚕到死丝方尽，蜡炬成灰泪始干 C.只要功夫深，铁杵磨成针 D.爆竹一声除旧岁，春风送暖入屠苏 3、小红在假期里帮妈妈做饭，当她把一壶水烧开之后，发现壶盖被水蒸气顶开了，并且有雾蒙蒙的气体夹杂着热水从壶嘴冲出，请你帮她分析一下可能的原因是： A．是化学变化 B．水分解生成了氢气和氧气 C．水分子变大了 D．水由液态变为气态，水分子间间隔变大了 4、“绿色化学”要求从根本上减少或杜绝污染。下列做法中符合绿色化学理念的是 A．实验中未说明药品用量时，取用较多量药品进行实验 B．实验室将废液直接倒入下水道 C．对废旧电池作深埋处理，消除其污染 D．化工生产中使原料尽可能地转化为产品 5、现有一杯有臭味的水，能除去臭味的方法是 A．搅拌 B．吸附 C．静置 D．过滤 6、在四川汶川大地震中，很多同胞失去了宝贵的生命。在这些遇难同胞中，有很多人不是被石块压死，而是在废墟里漫长的等待中严重脱水而死，说明了水对于我们生命的延续是如此的重要，下列关于水的说法中不正确的是 A．水是氧化物 B．水由氢、氧两种元素组成 C．水由水分子构成 D．水由两个氢原子和一个氧原子构成 7、下列物质属于纯净物的是 A. 冰水混合物 B. 清新的空气 C. 无色的盐水 D. 酸酸的食醋 8、下列微粒符号中，对“2”含义的理解正确的是 A. 2Cu中的“2”表示个铜元素 中的“2”表示每个亚铁离子带有2个单位的正电荷 2+B. Fe C. HS中的“2”表示一个硫化氢分子中含有两个硫原子2－2 D. Al(SO)中化学式上方的“2”表示硫元素为－2价429、将m个A分子与n个AB分子放入集气瓶内密闭加热，使之充分反应后，集气瓶内22原子的个数比为B与A． 3m2mn? D．．．．无法判断 A BC n2n210、下列有关二氧化碳的检验、制备和用途能达到目的的是 A．干冰用于人工降雨 B．二氧化碳气体通入紫色石蕊试液中，溶液变蓝 C．用块状石灰石和稀硫酸迅速制备大量二氧化碳 D．将燃着的木条伸入集气瓶，火焰立即熄灭，证明瓶内原有气体就是二氧化碳人教版初三英语上期末考试试卷及答案(精修版)
2016-2017年度第一学期期末数学试卷
(完整版)初中化学上学期期末试卷
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