江苏省南通市通州区育才中学2019-2020学年八年级下册英语第一次月考试卷
一、单项选择(每小题1分，共15分)
1.---My dream is to study in _____ European university some day.
--- It sounds like ______ unusual dream. I wish you can realize it.
A. a, a
B. an,a
C. an, an
D. a, an
2. If you want to go abroad, you should get your ________ prepared and check the date of it.
A. passport
B. address
C. message
D. note
3. ---I didn't see you yesterday. Where did you go? ---I ________ to visit my grandmother.
A. go
B. will go
C. went
D. have gone
4. --- We played _______ chess and watched a 3-D movie last Sunday. --- ______ fantastic time you had!
A the; what a B. a; how / C. /; what a D. the; how a
5. Yesterday my father _______ an invitation to a party this Sunday from his workmate, but he had no time to go so he didn’t _______ it.
A. received; accept
B. accepted; receive
C. accepted; accept
D. received; receive
6. The little girl was afraid of staying __________ in the __________ house.
A. alone; lonely
B. alone; alone
C. lonely; lonely
D. lonely; alone
7. ---Lily, keep the window _____ . The sandstorm hasn’t stopped yet.---OK. I’ll do that.
A. close
B. closed
C. open
D. opened
8. ---Have you ever been to Hong Kong? ---Yes, _____. It’s really a fun place.
A. for two year
B. twice already
C. five days
D. in two months
9. ---Are you doing well in your math? ---No, I_____my best, but I still can′t get good marks.
A. am trying
B. tried
C. have tried
D. will try
10. The factory _________ its waste into the river, but now it has changed a lot.
A. used to put
B. is used to put
C. used to putting
D. is used to putting
11. Sometimes people don’t _____ how important something is until they lose it. For example, many peop le don’t know how important trees are to people.
A. describe
B. realize
C. hope
D. return
12. ---Tom, why not stop _________ a rest?
--- Oh, no, mum. It’s so interesting that I can’t stop _________ the kite.
A. having; to fly
B. to have; flying
C. to have; to fly
D. having; flying
13. It’s said that two years________ since the old man _______.
A. has passed, has dead
B. has passed, died
C. have passed, died
D. have passed, has died
14. ---I have bought a Chinese-English dictionary. ---When and where _____ you _____ it?
A. have; bought
B. did; buy
C. will; buy
D. do; buy
15. ---Could you show me how to make a fruit salad?
---__________. First, you need to choose some fresh fruit of different colours.
A. It doesn't matter
B. My pleasure
C. With pleasure
D. You’re welcome
二、完形填空(每小题1分，共15分)
Do you like travelling? Today, I’ll give you some __16__ about travelling. You should have a good night’s sleep __17__ you travel. If you don’t, you will feel tired __18__ the way. You should take some __19__ with you. It may be helpful when you feel sick. You should have a meal before travelling. If you __20__ eat anything, you’ll feel hungry. And the food on the train is much more __21__ .
You should listen to the weather report earlier, so you can __22__ a good plan for your travel. You’d better take a(n) __23__ with you. It can keep off the sun and the rain. You should pack your right clothes when you prepare your luggage(行李). If you’re going from a hot place to a cold place, you have to __24__ some warm clothes. You should drink enough water. Don’t wait to be __25__ . You’d better take some water __26__ you can have a drink when you want to drink. You should write down all the travel __27__ : departure(出发) and arrival time, bus or train number, your parents’ names, address and phone number and so on. You should take a __28__ . You can take lots of photos when you see beautiful scenery. When you come back, you can show the __29__ to your friends. Above all, __30__ yourself when you are travelling. But please look after yourself and your things carefully.
( )16. A. idea B. advice C. name D. time
( )17. A. before B. after C. while D. as
( )18. A. in B. by C. on D. at
( )19. A. water B. drink C. food D. medicine
( )20. A. not B. won’t C. doesn’t D. don’t
( )21. A. difficult B. different C. expensive D. delicious
( )22. A. make B. get C. find D. put
( )23. A. raincoat B. bag C. box D. umbrella
( )24. A. take B. carry C. bring D. have
( )25. A. hungry B. sad C. happy D. thirsty
( )26. A. in order to B. so that C. though D. if
( )27. A. kind B. way C. information D. place
( )28. A. radio https://www.doczj.com/doc/f314372663.html, C. computer D. camera
( )29. A. presents B. pictures C. shoes D. computers
( )30. A. enjoy B. help C. forget D. report
三、阅读理解(每小题1分，共15分)
( ) 31. If you want to fly to Paris, you should take ___________.
A. Flight 137
B. Flight 320
C. Flight 226
D. Flight 405
( ) 32. Flight 289 to Hong Kong leaves at ________.
A. 11:43 a.m.
B. 10:12 a.m.
C. 12:32 p.m.
D. 10:30 a.m.
( ) 33. A lady wants to take Flight 12 to Beijing, she should go to Gate ______.
A. 14
B. 15
C. 12
D. 18
B
Today it is found that school students hardly pay much attention to sports. Is it because they aren’t interested in sports? No. They often say they have other more important things to do.
What are these important things? Examinations! Students have to spend much time on all kinds of examinations at school. So many of them almost become bookworms. Books stop them from doing sports. Because of the pressure from their parents and teachers, the students have to work harder and spend most of their time on books. As for the students, they want to get good results so that they can improve their studies. So it is necessary for them to give all of their free time to their studies and stop their school sports.
In fact, education can’t go without physical (身体的) exercises, because a quick mind hardly goes along with a weak body. If you don’t have a strong body, you can never get anything, let alone(更不用说) a great success in your life.
( ) 34. ______ are the greatest problems, so the schoo l students don’t pay much attention to sports now.
A. No interest
B. Exercises
C. Education
D. Examinations
( ) 35.The underlined word “pressure” means “_________”.
A. happy feeling
B. good care
C. nervous feeling
D. deep love
( ) 36. which sentence is true?
A. If students want to get better results in studies, they must not do sports.
B. If students spend all their time on sports, they will improve studies.
C. If you want to be successful in your life, you must have a strong body.
D. If you have a weak body, you will have a good mind.
( ) 37.The writer thinks the students should ________.
A. work hard all day and all night.
B. have all kinds of sports after studying.
C. do not have sports.
D. spend the free time on the studies and give up the sports.
C
Mike Myers is a teacher at Chauncey Rose High School in Terre Haute, Indiana. Last year, he taught his students about the world’s rain forests. They learned that rain forests are important because the plants and animals of the rain forest give us food, wood, and medicine.
Destruction of the world’s rain forests is a serious problem. Unluckily, rain forests are disappearing at a rate of 80 acres per minute! As part of a class project, Myers’ students bought three acres of rain forest in Central America. They paid $25 per acre. The students hope that the land they bought will be protected and not destroyed. The students became so interested in rain forests that they decided to get a closer look at a real rain forest.
So last June, Myers and four of his students took a boat ride down a river. They saw alligators and crocodiles. In the middle of the week, a guide took Myers and his students into the rain forest. “The monkeys were not happy that we were in their forest. They broke small branches off the trees and threw them at us,” one of the students said, “It was a great learning experience for all of us,” said Myers.
Each student chose something specific about Costa Rica to study involving the plants, animals, food, and culture. During the last few days the group had time to do fun activities. They went whitewater rafting and horseback riding, and visited Costa Rica’s active volcano.
Myers hopes to make the trip every year with a different group of kids.
( )38. How much did Myers’ students pay for the rain forest they bought?
A. $25
B. $75
C. $80
D. $2000
( )39. What did Myers and his students do at the beginning of the trip?
A. They went into the rain forest.
B. They bought acres of rain forest.
C. They took a boat ride down a river.
D. They visited Costa Rica’s active volcano.
( )40. The word “Destruction” in paragraph 2 probably means “the process of being ______.”A. destroyed（破坏） B. developed （发展） C. described（描述） D. discovered.（发现）
( )41. When the monkeys saw Myers and his students, they ___________.
A. felt excited
B. felt angry
C. jumped off the trees
D. left the rain forest
( )42. The passage mainly shows that Myers and his students _______.
A. did something to protect rain forest
B. wanted to buy the rain forest in Costa Rica
C. were interested in the culture of Costa Rica
D. went to the rain forest for various fun activities
D
Many Chinese people who have been to the United States think that Americans pay a little part of their money for food each day. Yet, in the latest 13 years, food prices have gone up 30% for most American families. Everyone agrees that the cost of feeding a family has risen sharply. But who is really responsible（有责任的）?
Many people say the farmers who produce the vegetables, fruit, meat, and eggs are responsible. But farmers say that the rise in food prices is very small compared to (和…相比) the rise in their cost of living. Farmers think middlemen have got much more money than they do. Middlemen are those people who stand between the farmers and the people who buy and eat the food. For example, truck drivers, owners of food stores and so on. Are middlemen really responsible for higher food prices?
Economists（经济学家）don’t think so. They have found that the money that meat packers and food stores get is less than 1% in all. They say that food costs more now because modern housewives have jobs outside the home. They have less time for cooking after a day’s work. They like to buy food which has already been prepared before it reaches the market. They want to buy many kinds of food that can be put on their dining tables easily and quickly. But of course they must be prepared to pay for the services of those who make their work easier.
It seems that the answer to the question of rising prices is not an easy one. Quite a number of people share the responsibility for the sharp rise in food costs.
( ) 43. Farmers speak for themselves because _____.
A. the middlemen have had the biggest share of profit（利润）
B. the cost of their products have risen sharply too
C. their cost of living has gone up a lot, too
D. they’ve got very little in the rise of food prices
( ) 44. Economists blame (责怪) _____.
A. farmers
B. middlemen
C. housewives
D. storeowners
( )45. What’s the writer’s opinion?
A. He agrees with the economists.
B. He doesn’t think farmers are responsible.
C. He thinks the middlemen might get a lot of profit.
D. He thinks all those people should be responsible.
四、词汇。(每小题1分，共15分)
A. 请根据括号中的中文提示、英文释义或句意，写出句中所缺单词，使句子通顺。
46. I hope more ____________ (采访) about the sports meeting in our city will be on TV.
47. Australia lies in the south of the earth so the seasons there are the ____________ (对立的人或物)of ours.
48. Tomatoes were brought to China _______ (a period of 100 years) ago.But at that time,few people liked them.
49. I wrote her ____________ (more than two) letters,but she hasn’t replied to me.
50. ---Why is the shop closed?
--- It is open every day ____________ Monday. You’d be tter go to another one.
52. These fantastic handbags are those policemen’s ____________ .
53. One of the storms could hit the ____________ area this week and the other early next week.
54. The boy has taken a course to learn all about ____________ .
55. The government has decided to move all the factories in the city because of ____________ .
57. Andy likes singing. She ____________ a pop song in the coming contest.
58. ---It must be on Channel 2. Try that.
---I ____________ that. But I still can’t get anything.
59. He always ____________ to school when he was a middle school student.
60. It ____________ hard outside when I got home yesterday afternoon.
五、句型转换(每空1分，共10分)
请根据要求改写下列句子，每空一词。
61. They have already finished the work. (改为否定句)
They _______ finished the work _______.
62. The film began fifteen minutes ago.(同义句)
The film has _______ _______ for fifteen minutes.
63. Our English teacher gave us very useful advice. (感叹句)
_______ _______ advice our English teacher gave us !
64. Tom has been at this school since he came to China. (划线提问)
_______ _______ has Tom been at this school?
65. We had a fantastic time on Space Mountain—an indoor roller coaster. (同义句)
We _______ _______ on Space Mountain—an indoor roller coaster.
六、缺词填空（共10空，每空1分，计10分）
根据短文内容和首字母提示，在下文空格处填入适当的词使短文完整。在标有题号的横线上，完整写出空缺处所填单词的正确形式。（每空一词）
When you finish high school or university(大学), is learning done? The answer is “no”. In many countries, people continue learning all their l____66____ . Why is lifelong(终身的) learning i____67____ ？
You go to school and learn. You study and take tests. B____68____ learning doesn’t only happen in school. Learning doesn’t s____69____ when you leave high school or college. You are learning all the time. For example, learning can h____70____ when you go to a museum. It can a____71____ happen when you get a job. You learn when you play a game or take a trip. Learning is everywhere! We n____72____ stop learning. Every day you can improve y____73____ by
learning something new.
In Japan, lifelong learning is very important. People in Japan like to try new learning. Music, calligraphy (书法) and foreign languages are some of their f____74____ classes. The Japanese take classes to improve their skills and learn new things.
When we are no l____75____ at school, we can continue to learn. Make lifelong learning one of your goals!
七、阅读与回答问题(每小题2分，共10分。答案写在后面的答卷部分)
Although many people read online, books have not gone out of fashion. In Beijing, Guangzhou and Shanghai, lucky passengers may find books somewhere on the underground.
The Fair, an online publishing company, has put 10, 000 books on the underground, planes and taxis to make people more interested in reading. This project is called “Mobook”.
“Mobook” gets its idea from “Books on the Underground”, a community project in London. The purpose of “Books on the Underground” is to encourage people to read more. Zhang Wei, the CEO of the Fair also wanted to do something in China. He sent an e-mail to Ms Cordelia Oxley, the leader of “Books on the Underground”, describing his plan and explaining the rules of “Mobook”. The leader replied to him in just two hours, saying that she thought the idea was great and she would offer help if needed.
But “Mobook” project is a little different from that in London. It has its own online system. People who want to donate books must give their information online. QR code stickers(二维码标签) are then sent to their addresses. The book owners should stick them on the books before donating books and readers can know where the books are from with the help of QR codes.
“Mobook” is a hot topic. Now thousands of bookworms have already taken part in the project. Zhang Wei said, “I am happy to see more and more people share their vie ws (观点) about the books online and enjoy the happiness that reading brings to them.”
根据上面短文的内容回答问题。（每个小题答案不超过6个单词）
76.How many books has the Fair put on the underground, planes and taxis?
_______________________________________________________
77.. Wha t’s the purpose of “Books on the Underground”?
_____________________________________________________
78. What did Ms Cordelia Oxley think of Zhang Wei’s idea?
______________________________________________________
79. Where should the book owners stick the QR code stickers?
_______________________________________________________
80. According to Zhang Wei, how can people share their views about the books?
_________________________________________________________
八、书面表达(共10分。答案写在后面的答卷部分)
请根据所给中文提示，以“My Hometown Nantong”为题用英语写一篇短文，向大家介绍你的
My Hometown Nantong
My hometown Nantong is a good place.______________________________________________________
_______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ ___________________________________________________________________________
高二12月份月考化学试卷 一、选择题（每小题3分，共20个小题60分） 1、下列热化学方程式书写正确的是(ΔH的绝对值均正确)( ) A．C2H5OH(l)＋3O2(g)===2CO2(g)＋3H2O(g) ΔH＝－1 367.0 kJ·mol －1(燃烧热) B．NaOH(aq)＋HCl(aq)===NaCl(aq)＋H2O(l) ΔH＝＋57.3 kJ·mol－1(中和热) C．S(s)＋O2(g)===SO2(g) ΔH＝－296.8 kJ·mol－1(反应热) D．2NO2===O2＋2NO ΔH＝＋116.2 kJ·mol－1(反应热) 2、关于如图所示装置的叙述，正确的是 A．铜是阳极，铜片上有气泡产生 B．铜片质量逐渐减少 C．电流从锌片经导线流向铜片 D．铜离子在铜片表面被还原 3、下图各容器中盛有海水，铁在其中被腐蚀时 由快到慢的顺序是（） A．④>②>①>③ B．②> ①>③>④ C．④>②>③> ① D．③>②>④>① 4、在可逆反应中，改变下列条件一定能加快反应速率的是 （） A．增大反应物的量 B．升高温度 C．增大压 强 D．使用催化剂 5、在含有浓度均为0.01mol?L-1的Cl-、Br-、I-离子的溶液中，缓慢加入AgNO3稀溶液，析出三种沉淀的先后顺序是（） A. AgCl、AgBr、AgI B. AgI、AgBr、AgCl C. AgBr、AgCl、AgI D. 三种沉淀同时析出 6、一定温度下,反应N2(g)+3H2(g)2NH3(g)达到化学平衡状态的标志是( ) A.N2、H2和NH3的物质的量分数不再改变 B.c(N2)∶c(H2)∶c(NH3)=1∶3∶2 C.N2与H2的物质的量之和是NH3的物质的量的2倍
南通市通州区2020届高三第一次调研抽测 地理试题 第 I 卷（选择题） 一、单项选择题 （本大题共18小题。在每小题的四个选项中，只有一项符合题目要求，请将正确答案的代号涂在答题纸上。）2017年3月某日晴朗的夜晚,金星和火星一亮一暗、一大一小似“双眼”与弯月构成一张“笑脸”，不过在大城市中心城区和郊区，天文爱好者看到的是两幅大为不同的画面。 读图回答下列各题。 1. 金星和火星“一亮一暗、一大一小”的原因是 A. 金星距离地球较火星近 B. 金星的质量和体积均较火星小 C. 金星距离太阳较火星远 D. 金星得到的月球光亮较火星多 2. 大城市中心城区的天文爱好者只看到“金星伴月”，看不到火星的主要原因是 A. 云量多 B. 建筑高 C. 灯光强 D. 气温高 【答案】1. A 2. C 【解析】 本题组主要考查地球的宇宙环境等相关知识。 【1题详解】 金星和火星属于类地行星，自身不能发光，依靠反射太阳光为人类所见，因此在地球上的人们看到金星和火星“一亮一暗、一大一小”，主要原因是金星距离地球更近，A选项正确，金星的质量和体积均比火星大，B错误；金星距离太阳比火星近，C错误；金星主要反射太阳光，与月球无关，D错误。 【2题详解】 由于火星亮度较暗，大城市中心城区受人类灯光污染的影响，看不到火星，只能看到金星伴月，C选项正确，云量多有影响，但不是主要原因，建筑高和气温高对观测星空没有影响，ABD错误。 徐霞客，江苏江阴人，明代地理学家、旅行家和文学家。《徐霞客游记》在地理学和文学上都有着重要的价值．下图为徐霞客旅行路线示意图。
读图回答下列小题。 3. 徐霞客在《滇游日记》中写道“江流捣崆中愈骤，崆中石耸突而激湍，或为横槛以扼之，或为夹门以束之……”此段文字描述的河流位于 A. 横断山区 B. 雁荡山区 C. 秦岭山脉 D. 长江三峡 4. 徐霞客旅行考察区域涵盖了 A. 地势第一、二级阶梯 B. 湿润区、半湿润区 C. 外流区、内流区 D. 农耕区、牧区 【答案】3. A 4. B 【解析】 【3题详解】 结合材料江流捣崆中愈骤，崆中石耸突而激湍，或为横槛以扼之，或为夹门以束之，所描述是河流波涛汹涌，该区域地势起伏大，落差大，多高山峡谷地貌，结合图示推断应为横断山区，A正确。 【4题详解】 结合图示分析，徐霞客旅行区经过我国二三级阶梯；亚热带季风区和温带季风气候区即湿润与半湿润地区，集中在外流区；农耕区，因此ACD错误，B正确。 下图为某游客于2019年6月22日在北京西部郊区（约 40°N）某光伏发电产业园区一角拍摄的照片，据此回答下列各题。
新人教版七年级下册英语第一次月考试卷
七年级英语3月份月考试题（120分）3.15 注意：（选择题答案写在题后答题卡上） 第Ⅰ卷(选择题，共60分) 一、单项选择（10分） ( ) 1. Lisa is good at . A. draw B. drawing C. draws D. to draw ( ) 2. —you play the guitar? —Yes, I can. A. Do B. How C. Can D. Does ( ) 3. Do you like ______ chess？ A. playing B. play the C. playing the D. plays ( ) 4. I can’t sing dance. A. and B. or C. but D. under ( )5. Tom ____ his homework in the evening . A. does B. do C. makes D. to do ( )6.We go to school at . A. thirty seven B. seven to thirty C. thirty to seven ( )7.He his bike to school. A. rides B. by C. takes D. to take ( )8. It me two hours to do my homework. A. take B. takes C. uses D. to take ( )9. _____ is it from your home to school ? A. How many B. How far C. How long D. How many ( )10. Can your mother dance? A. Yes, she does B. No, she can C. Yes, she can D. Yes, she do
人教版（PEP）五年级上册英语第一次月考试卷及答案 一、单选题（共10题；共20分） 1. ( 2分) —________she kind? —Yes, she ________. A. Is; is B. Does; does C. Is; isn't 2. ( 2分) Some teachers like quiet ________. A. students B. student C. child 3. ( 2分) —________ is your music teacher? —Miss Wang. A. Who B. What C. Where 4. ( 2分) —________ do you have on Fridays, John? —We have art, maths and English. A. How B. What C. Where 5. ( 2分) ________ she play ping pong on the weekend? A. Do B. Does C. Doing 6. ( 2分) I often listen ________ music after school. A. on B. for C. to 7. ( 2分) I do ________ homework after dinner. A. my B. I C. me 8. ( 2分) Wu Yifan often _________ TV after lunch. A. watch B. watchs C. watches 9. ( 2分) I often _________ on the weekend. A. play the football B. play the pipa C. play the basketball 10. ( 2分) ________ comes after Monday. A. Sunday B. Friday C. Tuesday 二、判断题（共4题；共8分） 11. ( 2分) Mike plays football on Sundays. 12. ( 2分) He often reads books in this park.
湖北省武汉市九年级化学12 月月考化学考试题及答案 姓名:_____________ 年级:____________ 学号:______________ 题型 选择题填空题简答题xx题xx题xx题总分 得分 一、选择题（共7题） 1.下列变化前者是物理变化，后者是化学变化的是（） A.刻舟求剑轮胎爆炸 B. 蜡炬成灰汽油燃烧 C.滴水成冰光合作用 D.大海捞针灯泡发光 【答案】C 难度：容易知识点：物质的变化和性质 2.化学实验既要操作规范,更要保障安全。如图所示实验基本操作符合这一要求的是() A.给液体加热 B.收集CO2并验满 C.闻气体气味 D.滴加液体 【答案】B 难度：容易知识点：制取氧气 3.三甲基一氯硅[（CH3）3SiCl]是一种生产硅化合物的原料，遇火能燃烧甚至会发生爆炸，与水接触可产生盐酸.则下列说法错误的 是（） A. 保存三甲基一氯硅时应密封防水 B. 三甲基一氯硅充分燃烧的产物之一是二氧化碳 C. 三甲基一氯硅由四种元素组成 D. 三甲基一氯硅由碳、氢、硅、氯四个原子构成 【答案】D 难度：容易知识点：化学式与化合价 4.如图表示的是纯净物、单质、化合物、含氧化合物、氧化物之间的包含与不包含关系,若整个大圆圈代表纯净物,则在下列选项中,能正确指出①、②、③、④所属物质类别的是() 评卷人得分
A. ①单质、③氧化物 B. ②化合物、④氧化物 C. ①单质、③化合物 D. ②含氧化合物、④氧化物 【答案】B 难度：容易知识点：元素 5.下列关于实验装置的使用方法正确的是（） ①用于排水法收集氧气：C中充满水，由B进气，A排放水 ②用于收集二氧化碳：A进气，B排放空气 ③用于收集氢气：B进气，A排放空气 ④用于洗气，除去H2中少量CO2：C中足量石灰水，A进气，B出气 ⑤用于测量CO2的体积，C中充满水，B进气，A出水，计算溢出水的体积. A. 全正确 B. ②③④ C. ③④⑤ D. ①②③④ 【答案】D 难度：容易知识点：制取氧气 6.有关下图中甲、乙、丙、丁所示实验的说法错误的是() A．甲实验目的是检验氢气的纯度，如果听到尖锐的爆鸣声，则氢气不纯 B..乙实验既证明浓氨水易挥发，也说明分子是不断运动的 C. 丙实验可证明通常情况下二氧化碳的密度比空气大且二氧化碳不能燃烧也不支持燃烧 D.丁实验既可证明二氧化碳能溶于水也可证明二氧化碳能与水反应 【答案】D 难度：中等知识点：二氧化碳和一氧化碳 7.已知木炭粉(假设木炭粉中不含其他杂质)和氧化铁（Fe2O3）在高温条件下发生化学反应。为了测定反应
2018年江苏省南通市通州区中考数学一模试卷 一、选择题（本大题共10小题，每小题3分，共30分．在每小题给出的四个 选项中，恰有一项是符合题目要求的，请将正确选项的字母代号填涂在答题卡相应位置上） 1．（3分）﹣4的相反数是（） A．B．﹣C．4D．﹣4 2．（3分）下列计算，正确的是（） A．a3+2a=3a4B．a4÷a=a3C．a2?a3=a6D．（﹣a2）3=a6 3．（3分）2017年南通地区生产总值约为7700亿元，将7700亿用科学记数法表示为（） A．7.7×108B．7.7×109C．7.7×1010D．7.7×1011 4．（3分）下列水平放置的几何体中，左视图是圆的是（） A．B． C．D． 5．（3分）如图，BC∥DE，若∠A=35°，∠E=60°，则∠C等于（） A．60°B．35°C．25°D．20° 6．（3分）如图，在平面直角坐标系中，直线y=与y轴交于点A，与x轴交于点B，则tan∠ABO的值为（）
A．B．C．D．2 7．（3分）用一个圆心角为120°，半径为6的扇形作一个圆锥的侧面，则这个圆锥的底面半径为（） A．1B．2C．3D．6 8．（3分）若关于x的不等式组的解集为x＜3，则k的取值范围为 （） A．k＞1B．k＜1C．k≥1D．k≤1 9．（3分）端午节前夕举行了南通濠河国际龙舟邀请赛，在500米直道竞速赛道上，甲、乙两队所划行的路程y（单位：米）与时间t（单位：分）之间的函数关系式如图所示，根据图中提供的信息， 有下列说法： ①甲队比乙队提前0.5分到达终点 ②当划行1分钟时，甲队比乙队落后50米 ③当划行分钟时，甲队追上乙队 ④当甲队追上乙队时，两队划行的路程都是300米 其中错误的是（） A．①B．②C．③D．④ 10．（3分）如图，AB为⊙O的直径，C为⊙O上一点，点D为半圆AB的中点，CD交AB于点E，若AC=8，BC=6，则BE的长为（）
七年级第一次月考英语试题 一、词语使用（请根据句意和首字母或所给信息将句子补充完整。）共10分，每小题1分。 1. How many __________ (颜色) do you like? 2. Don’t forget your __________ (夹克). 3. Jack is my _________(同班同学). 4. ---W_________ book is this? ---It’s Li Ming’s. 5. Her ____________（女式衬衫）is very nice. 6. I ___________ (真地)like apples. 7.Jim has two ___________ （围巾）.They are new. 8. Are you __________(准备好的)for class? 9. These are my shoes. Look! They are _________ (恰恰，差不多) right for me. 10.These women are ____________(漂亮的)in the black and white uniforms. 二、单项选择。共20分，每小题1分。 ( )1. ---Hello! My name is Lucy. ---____! My name is Kate. A Hello B Fine C Goodbye D Thanks ( )2 This is _____ eraser and that is ____ ruler. A a,a B an,an Ca,an D an,a ( )3 The red skirts ____ Betty’s. A be B am C is D are ( )4 ---_______ ---I’m fine,thanks. A How are you? B What’s your name? C Good morning. D See you later. ( )5---I like the dress. --- ______. A Me, too. B I do C I am D I too. ( )6---_______! Where is the school?---Here it is. A Excuse me B Hello C Sorry D Thank you ( )7---Do you have a blue shirt? ---No, I ____. A isn’t B don’t C doesn’t D aren’t ( )8 Let’s go ____ to buy some pencils. A shop Bshops C shopping D shoppings ( )9 ---Is this sweater new?---No. It’s ____. A big B small C old D nice ( )10 Your ____ are over there. A blouse B shoes C skirt D shirt ( )11 He looks nice ____green. A at B in C for D with ( )12 ---What’s that? --- It’s _____ sweater. A she B her C he D me ( )13_____ hats are Lucy’s. A These B This C That D Her ( )14 The ___ are in my bag. A hat B apple C keys D boy ( )15 ____ book is here. _____ can read it. A I, You B MY, Your CＭy, you D I, your ( )16 We have ____ in our classroom. A lesson B lessons C class D classes ( )17 You can’t buy all the things ___ your list. A in B on C for D with ( )18 ---Can I help you? --- Yes, I want to buy some things ____ my class. A for B in C to D at ( )19 The boy ___ a good student. ____ name is Wu Bing. A am, He B is, His C are, His D is, He ( )20 ---Green is my favourite colour. _____?
2019-2020学年度第一学期第一次月考试题 五年级 英语 请将第一至第八大题答案写在下面表格中对应的题号下面，否则不 给分。（1-40每小题2 分，41-45每小题1分，共85分。） Listening Part (听力部分40分) 一、听录音，选出你所听到的单词。（10分） ( ) 1. A. funny B. young C. kind ( ) 2. A. strict B. speak C. shy ( ) 3. A. Mr B. Mrs C. Miss ( ) 4. A. helpful B. polite C. clever ( ) 5. A. English B. maths C. music 二、听录音，给下列句子排序。（10分） ( ) 6.It ’s a storybook. ( ) 7. Do you often read books in this park? ( ) 8. What do we have on Fridays? ( ) 9. Who ’s your art teacher? ( ) 10. I have a football class. 三、听录音，选出你所听到的句子。（10分） ( )11 . A.Who ’s your English teacher? B. Who ’s your art teacher? ( )12. A.Is she kind? B. Is he young? ( )13. A.Do you know Miss White? B. Do you know Mr Jones? ( )14. A.He ’s our art teacher. B.She ’s the head teacher. ( )15. A.What ’s Chen Jie like? B. What ’s Ms Wang like? 四、听录音，选择正确的答句。（10分） ( )16. A.It ’s an English book. B.It ’s Friday today. ( )17. A.I have maths and music. B.I love music. ( )18. A.No, they aren ’t. B.Yes,it is. ( )19. A.Yes,I do. B.No,he doesn ’t. ( )20. A.I have a basketball class. B. He ’s funny. Writing Part (笔试部分60分) 五、找出不同类的单词。（10分） ( ) 21.A.tall B.strong C.morning ( ) 22.A.Monday B.Tuesday C .old ( ) 23.A.maths B. teacher C.music ( ) 24.A.tomato B.beef C. potato ( ) 25.A.sunny B.windy C.happy 六、选择正确答案并将字母序号填在括号里。(20分) ( ) 26.—— __________your maths teacher? —— Mr. Zhao .
高中化学学习材料 （精心收集**整理制作） 东莞市常平中学高一年级12月月考化学试题 本试卷满分为100分。考试时间60分钟。2010-12-23 第一部分选择题(共54分) 一、选择题(本题包括10小题，每小题3分，共30分。每小题只有一个选项符合题意) 1、铝合金在日常生活、建筑装潢、航空航天和汽车制造等方面均有着广泛的用途。下列关于铝合金 具有广泛用途的分析不正确的是 A．铝元素在地壳中的含量高，储量丰富B．铝容易形成致密的氧化膜，抗腐蚀性能好C．铝化学性质稳定，常温下不与任何酸碱反应D．铝的冶炼技术基本成熟，可以大量生产2．硅被誉为无机非金属材料的主角，下列物品用到硅单质的是 A．陶瓷餐具B．石英钟表C．计算机芯片D．光导纤维 3．下列变化过程属于物理变化的是 A．活性炭使红墨水褪色B．雷雨天氮气与氧气化合 C．氨气溶于水D．酸雨侵蚀建筑物 4．下列情况会对人体健康造成较大危害的是 A．用小苏打(NaHCO3)发酵面团制作馒头B．用食醋清洗热水瓶胆内壁附着的水垢 C．用Al(OH)3治疗胃酸过多D．用SO2加工食品使食品增白 5．黑火药是由硫黄粉、硝酸钾和木炭按一定比例混合而成的，爆炸时的反应是：S+2KNO3+3C =K2S+N2+3CO2，该反应的还原剂是（） A．C B．S C．KNO3D．S和KNO3 6．汽车排放尾气中含有氮的氧化物而污染大气，产生氮的氧化物的主要原因是A．燃烧含氮化合物燃料引起的B．燃烧含铅化合物引起的 C．由于燃烧不充分引起的D．在气缸中氮气被氧化生成的 7．铁和铁合金是生活中常见的材料，下列说法正确的是 A．铁与盐酸反应，铁合金不与盐酸反应B．一定条件下，铁粉可与水蒸气反应 C．不锈钢是铁合金，只含金属元素D．纯铁的硬度和熔点均高于铁合金 8．氧化还原反应与四种基本类型反应的关系如下图所示，则下列化学反应属于区域3的是 A．4Fe(0H)2+O2+2H2O 4Fe(OH)3 B．2NaHCO3Na2CO3+H2 O+CO2↑ C．4NH3+5O24NO+6H2O D．Zn+H SO4ZnSO4+H2↑ 9、类推思维是化学解题中常用的一种思维方法，下列有关离子方程式的类推正确的是( ) 已知类推 A 将Fe加入CuSO4溶液中将Na加入到CuSO4溶液中
2020-2021学年江苏省南通市通州区金沙中学高一（下）调研数 学试卷 一、单选题（共8小题）. 1．设集合M＝{x|x＞﹣1}，集合N＝{x|﹣2＜x＜1}，则M∩N＝（）A．（﹣2，﹣1）B．（﹣1，1）C．（﹣1，+∞）D．（﹣2，+∞）2．已知命题p：?x＞1，x2﹣4＜0，则￢p是（） A．?x＞1，x2﹣4≥0B．?x≤1，x2﹣4＜0 C．?x≤1，x2﹣4≥0D．?x＞1，x2﹣4≥0 3．在平面直角坐标系中，若角α的终边经过点P（1，﹣2），则sinα＝（）A．B．C．D． 4．将函数f（x）＝sin2x的图象向左平移个单位后与函数g（x）的图象重合，则函数g （x）为（） A．B．C．D． 5．下列函数中，在其定义域上既是奇函数又是单调递增函数的是（）A．B．y＝x3C．y＝lnx D．y＝sin x 6．已知a＝log20.4，b＝log0.40.5，c＝20.4，则（） A．a＜b＜c B．c＜b＜a C．a＜c＜b D．c＜a＜b 7．函数的定义域为（） A．[﹣2，0]B．（﹣2，0）C．（﹣2，0]D．（﹣2，+∞）8．已知函数f（x）＝，则f（log23）＝（） A．6B．3C．D． 二、多选题（共4小题）. 9．设函数，下列说法正确的是（） A．函数f（x）是偶函数 B．函数f（x）是奇函数 C．函数f（x）有最大值1
D．函数f（x）在（﹣∞，0）上单调递减 10．已知a＞b＞c，且ac＜0，则下列不等式恒成立的有（） A．B．C．D． 11．已知θ∈（0，π），，则下列结论正确的是（）A．B． C．D． 12．下列说法中，正确的有（） A．e ln1+lg2+lg2lg5+lg25＝2 B．幂函数y＝xα图像过原点时，它在区间（0，+∞）上一定是单调增函数 C．设a，b∈（0，1）∪（1，+∞），则“log a b＝log b a”是“a＝b”的必要不充分条件 D．“”是“函数f（x）＝sin（2x+φ）为偶函数”的充要条件三、填空题（共4小题）. 13．已知幂函数f（x）＝xα的图象过点，则该函数的解析式为f（x）＝．14．已知扇形的圆心角为1，半径为2，则该扇形的面积为． 15．若x＞1，则9x+的最小值等于． 16．不等式的解集为{x|﹣2＜x＜1}，则函数的单调递增区间是． 四、解答题 17．已知，且． （1）求cosα，tanα的值； （2）求的值． 18．集合A＝{x|＜2x＜8}，B＝{x|a﹣1＜x＜2a+1}． （1）当a＝0时，求A∩B； （2）若B?A，求实数a的取值范围． 19．已知函数f（x）＝2x，x∈R．
七年级英语下册第一次月考一 .听力理解（20分）
二.单选题（20分）。 （）1. It’ time lunch. A. to B. have C. for D. in （）2. His bike is new. What about ? A. your B. you C. me D. yours ( ) 3. We have English lessons _______ Monday ________ Friday. A.on; to B.at; on C. from; to D. from; on ( ) 4.They often go to the park _____________. A. take a taxi B. by taxi C. take taxi D. by a taxi ( )5.------ Which is your sister? ------ The one _________ white shirt. A. in B. on C. of D. with （）6. — does the math class finish? —A t about 5 o’lock. A. How B. How often C. What time D. Where （）7. — can I keep this book? —F or two weeks. A. How soon B. How long C. How often D. How many ( )8. I can speak English, but ______________________. A. very much B. a lot C. not much （）9.grade do you teach, Mr.Lee? —Grade Seven. A. How B. Who C. Why D. Which （）10. —What’re you doing ? —I’m my pencil. A. finding B. looking C. reading D. looking for （）11. Let my son ________you, will you? A. to helps B. help C. helps D. helping （）12. My sister takesin the gym every day. A. exercise B. exercises C. Exercise D. an exercise （）13. 1.Jim,don’t talk Bill and listen me,please. A.with；at B.to；with C.to；to D.at；to
13/14学年第一学期五年级英语第一次月考反思总结 从这次月考看来，从试卷中看出学生整体的，做题思维需要有待提高，教得比较死板，卷面字体是不太端正。 分别从试卷与学生情况作出详细的分析： 一、从试卷上来看，本次期中检测题比较全面的考试了unit1-unit3的知识，难易程度适中。其中听力部分总体比较简单，只有听音补充所缺单词一题较难。学生不注意单复数以及助动词后面加动词原形，导致失分较多。 学生的语音知识掌握不到位，除了书上的例词，其他的类似的字母在单词中的发音混淆不清、错误百出。这和平时在教学中没有去强调拓展有关，只立足与书本是不够的，语音题错一半的人较多，全对的很少。学生的做题习惯不好。如在听力之前，没有先利用有限的时间去读题，在做笔试部分的时候，比较粗心大意。对于老师反复讲的题目，一部分学生还是会犯错误，做题不看题。如连词成句，单词抄漏的，或是字母开头没大写的，其中单词model,学生写成了modcl,非常粗心。选择题涉及到语法的运用，学生的失分也是较多。 二、从学生情况看来，总的来说，班级看来是优生不多，中下层学生大面积存在。所以教师对于学生的帮扶工作要加大力度，要把中下层的学生拉上来。今后工作努力方向及下一步采取措施： （1）继续坚持一帮一的制度，发挥学生的作用，优生带差生，减轻老师辅差任务，提高辅差效率；在课后留下来背的过程中，人数也偏多，有时候会浑水摸鱼。所以今后坚持在听写单词后，做好相关记录，留下那些严重不过关的同学，首先要求掌握四会词汇，做到分层教学；而对于那些出现个别错误的同学，则选择集中重听。而对于课文的背诵，则要求每一课过关，坚持做好印章或者记录。 （2）提高课堂学生的听课质量，抓好班级管理建立小组比赛机制。从端正学习态度做起，转化那些调皮学生的学习习惯；在教授Sounds and
扬州市梅岭中学九年级化学质量检测试卷 可能用到的相对原子质量：H 1 C 12 N 14 O 16 Mg 24 Al 27 S 32 Ca 40 Fe 56 Cu 64 Zn 65 选择题 单项选择题：本题包括15小题，每小题2分，共计30分。每小题只有一个 ．．．．选项符合题意。1．下列属于纯净物的是 A．液态氮B．加碘盐C．食用醋D．高钙奶 2．铜能被加工成厚度仅为7微米的超薄铜箔，说明铜具有良好的 A．导电性B．延展性C．导热性D．抗腐蚀性 3．下列关于O2、CO2、SO2的说法中，正确的是 A．都含有氧分子B．都是氧化物 C．氧元素的化合价相同D．都含有氧元素 4．下列物质不属于合金的是 A．青铜B．铝C．钢D．生铁 5．镍元素在元素周期表中的信息如图所示，下列有关镍元素的说法 不正确的是 A．原子序数是28 B．属于金属元素 C．原子中的质子数是28 D．相对原子质量为58.69g 6．火箭推进器中盛有N2H4和H2O2，发生反应的化学方程式：N2H4+2H2O2=R+4H2O，其中R的化学式为A．N2B．N2O4C．NH3D．NO2 7．实验室用KClO3制氧气并回收MnO2和KCl，下列操作不规范的是 A．用装置甲收集氧气B．用装置乙溶解完全反应后的固体 C．用装置丙分离MnO2和KCl溶液 D．用装置丁蒸干分离后的溶液得KCl晶体
8．最近“纸火锅”（如图）逐渐流行起来。“纸火锅”是用纸张代替金属材料做容器盛放汤料，当酒精燃烧时纸张不会燃烧。对此现象，下列解释合理的是 A．纸张不是可燃物，不能燃烧 B．纸张被水浸湿，导致着火点降低 C．水蒸发时吸收热量，温度达不到纸张的着火点 D．空气不充足，纸张不会燃烧 9．塑化剂是一种化工原料，属于致癌物，不能用于食品添加剂。其最常见的品种是DEHP。下列关于DEHP（化学式为C24H38O4）的说法正确的是 A．属于氧化物 B．碳、氢、氧三种元素质量比为24:38:4 C．完全燃烧后生成二氧化碳和水分子的个数比为12:19 D．碳元素的质量分数约为73.8% 10．下列关于S+O2点燃SO2的理解不正确的是 A．表示硫与氧气在点燃条件下反应生成二氧化硫 B．参加反应的硫与氧气的质量比是2：1 C．反应前后硫原子、氧原子的个数均不变 D．参加反应的氧气与生成的二氧化硫的分子个数比为1：1 11．以下是四个化学反应的微观示意图，图中不同的圆圈代表不同的原子，其中能表示置换反应的是 A．B． C． D． 12．光亮的铁钉在下列几种情况下，最不容易生锈的是 A．B．C．D． 13．在化学反应：2Mg+CO2点燃2MgO+C中作还原剂的物质是 A．C B．Mg C．MgO D．CO2
江苏省南通市通州区金沙中学2020-2021学年高二上学期10 月阶段测试数学试题 学校:___________姓名：___________班级：___________考号：___________ 一、单选题 1．设x ∈R ，则“05x <<”是“11x -<”的 A ．充分而不必要条件 B ．必要而不充分条件 C ．充要条件 D ．既不充分也不必要条件 2．数列1,3,5,7--的一个通项公式为（ ） A ．21n a n =- B ．() ()1 121n n a n +=-?- C ．()()121n n a n =-?- D ．()()121n n a n =-?+ 3．已知数列{a n }满足a n ＋1－a n ＝2，a 1＝－5，则|a 1|＋|a 2|＋＋|a 6|＝（ ） A ．9 B ．15 C ．18 D ．30 4．在正项等比数列{}n a 中，若63a =，则313233311log log log log a a a a ++++= （ ）． A ．5 B ．6 C ．10 D ．11 5．我省高考从2021年开始实行3+1+2模式，“3”为全国统考科目语文、数学、外语，所有学生必考；“1”为首选科目，考生须在物理、历史两科中选择一科；“2”为再选科目，考生可在化学、生物、思想政治、地理4个科目中选择两科，今年某校高一的学生小霞和小芸正准备进行选科，假如她们首选科目都是历史，再选科目她们选择每个科目的可能性均等，且她俩的选择互不影响，则她们的选科至少有一科不相同的概率为（ ） A ． 1 6 B ． 12 C ． 56 D ． 34 6．设等比数列{}n a 的前n 项和为1 2n n S m +=+，则n a =（ ） A ．2n B ．132n -? C ．152n -? D ．32n ? 7．已知圆C 与直线0x y +=及20x y ++=均相交，若四个交点围成的四边形价为正方形，则C 的半径为（ ）
七年级下册第一次月考英语试带答案 二、单项选择 (共10小题，每小题1 分，满分10分) ( ) 21. He is _______ in hospital, so he is a ________ person. A. ill, ill B. ill, sick C. sick, ill D. /, ill ( ) 22. There are ____ floors in this building, and my flat is on the ____ floor. A. ten; five B. tenth; f ive C. tenth; fifth D. ten; fifth ( ) 23. We read 10 ,206 like this________. A. one thousand, two hundred and six B. one thousands, two hundred and six C. ten thousand, two hundred and six D. ten thousand, two hundred six ( ) 24. --Is Miss Liu in the classroom now? --No, she is out. If you have something to tell her, I can ________. A. call her back B. take a message C. talk about you D. chat with you ( ) 25. There is going to _______ a football match in our school. A. have B. has C. is D. be ( ) 26. -Why don't you go to play basketball with the young men? --They don't _______me.
小学英语五年级下册 第一次月考测试卷 （考试时间：60分钟总分：100分）一．火眼金睛。（选出不同类的单词）（10分） （）1. A. farmer B. drive C.worker （）2. A. buses B. cars C. desk （）3. A. lived B. danced C. taught （）4. A.food B. radio C. telephone （）5. A. ago B. yesterday C. tomorrow 二．单词加工厂。（用所给单词的适当形式填空）（10分） 1. There (be) an apple and two oranges on the table. 2. What (do) you do yesterday? 3. My grandmother (make) a cake for me yesterday. 4. Sam (go) to school at eight every day. 5. She (work) in the fields ten years ago. 三．从方框中选择适当的介词填空。（10分） 1. Many years ago my grandparents lived a small house. 2. Look! It’s a programme China. 3. Thank you talking to us. 4. My grandma cooked a fire. 5. She learnt cook. 四．单项选择。（20分） （）1. There any books on the desk yesterday. A. are B. were C. weren’t （）2. I didn’t a bike two years ago.. A. have B. has C. had （）3. old lady talked about her life. A. A B. An C. a （）4. --- are they, Lingling? --- They’re my grandparents. A. Who B. What C.Where （）5. Many years ago, we didn’t have a TV a computer. A. and B. or C. of （）6. China is . A. changing B. change C. changeing （）7. There are too children. There isn’t food. A.much,enough B.many,enough C.many,much （）8. Mr Li Chinese now . A．is teaching B. teach C.taught
遵化市堡子店中学高三年级 十二月月考化学试卷 （考试内容为必修，满分为100分，考试时间为90分钟） Ⅰ卷（共48分） 一、选择题（共16小题，每小题3分，每小题有且只有一个正确答案） 1、2016年1月5日，江西省国土资源厅宣布，该省地质工作者在浮梁县发现超大型 钨铜矿。下列有关W 182 74、W 184 74 、W 186 74 的说法正确的是( ) A．它们是钨的三种元素 B．它们互为同位素 C.W 184 74 的中子数与质子数之差为110 D．它们的所有性质几乎完全相同 2．分类是化学学习和研究的常用手段，下列分类依据和结论都正确的是( ) A．H 2O、HCOOH、Cu 2 (OH) 2 CO 3 均含有氧元素，都是氧化物 B．HClO、H 2SO 4 (浓)、HNO 3 均具有氧化性，都是氧化性酸 C．HF、CH 3COOH、CH 3 CH 2 OH都易溶于水，都是电解质 D．HCOOH、H 2CO 3 、H 2 SO 4 分子中均含有两个氢原子，都是二元酸 3、7瓶分别含有Cu2＋、Fe3＋、Al3＋、Mg2＋、Fe2＋、+ 4 NH、Na＋等离子的溶液，只用一种试剂即可鉴别，该试剂是( ) A．KMnO 4 溶液B．KSCN溶液 C．NaOH溶液D．NH 3·H 2 O溶液 4、高铁酸钠(Na 2FeO 4 )可用于饮用水的净化处理，可由下列方法制得高铁酸钠：2FeSO 4 ＋6Na 2O 2 ===2Na 2 FeO 4 ＋2Na 2 O＋2Na 2 SO 4 ＋O 2 ↑，下列关于该反应的说法正确的是( ) A．反应中Na 2O 2 只作氧化剂 B．Na 2FeO 4 既是氧化产物又是还原产物 C．生成1 mol Na 2FeO 4 ，有4 mol电子转移 D．Na 2FeO 4 中Fe为＋4价，具有强氧化性，能消毒杀菌 5、向含有FeBr 2、FeI 2 的溶液中通入一定量的氯气后，再向溶液中滴加KSCN溶液， 溶液变为红色，则下列叙述不正确的是( ) A．通入氯气后的溶液中一定不存在I－ B．通入氯气之后原溶液中的Fe2＋全部被氧化 C．原溶液中的Br－可能被氧化 D．若取少量所得溶液，再加入CCl 4 溶液充分振荡、静置、分液，下层溶液呈紫红色 6、下列离子方程式错误的是( ) A．向Mg(HCO 3 ) 2 溶液中加入过量的NaOH溶液： Mg2＋＋— 3 HCO 2＋4OH－===Mg(OH)2↓＋—2 3 CO 2＋2H2O B．向亚硫酸钡固体中加入稀硝酸：3BaSO 3 ＋2H＋＋2NO— 3 ===3BaSO 4 ↓＋2NO↑＋H 2 O C．在银氨溶液中滴加过量稀硝酸：[Ag(NH 3 ) 2 ]＋＋2H＋===Ag＋＋2NH+ 4 D．向NH 4 HSO 4 稀溶液中逐滴加入Ba(OH) 2 稀溶液至SO42－刚好沉淀完全： Ba2＋＋2OH－＋NH+ 4 ＋H＋＋SO—2 4 ===BaSO 4 ↓＋NH 3 ·H 2 O＋H 2 O 7、某白色粉末由两种物质组成，为鉴别其成分进行如下实验： ①取少量样品加入足量水仍有部分固体未溶解；再加入足量稀盐酸，有气泡产生， 固体全部溶解； ②取少量样品加入足量稀硫酸有气泡产生，振荡后仍有固体存在。 该白色粉末可能为( ) A．NaHCO 3 、Al(OH) 3 B．AgCl、NaHCO 3 C．Na 2 SO 3 、BaCO 3 D．Na 2 CO 3 、CuSO 4 8、清代赵学敏《本草纲目拾遗》中关于“鼻冲水”的记载明确指出：“鼻冲水，出 西洋，……贮以玻璃瓶，紧塞其口，勿使泄气，则药力不减……惟以此水瓶口对鼻吸其 气，即遍身麻颤出汗而愈。虚弱者忌之。宜外用，勿服。”这里的“鼻冲水”是稀硫酸、 氢氟酸溶液、氨水、醋酸溶液中的一种。下列有关“鼻冲水”的推断正确的是( ) A．“鼻冲水”滴入酚酞溶液中，溶液不变色 B．“鼻冲水”中含有5种粒子 C．“鼻冲水”是弱电解质 D．“鼻冲水”不能使二氧化硅溶解