高二第二學期期中化學考試
學科網
2009年甘肅省河西五市部分普通高中高三第二次聯考
英語試題
第I卷（選擇題 共95分）
第一部分：英語知識運用（共三節，滿分50分）
第一節 語音知識（共5小題；每小題1分，滿分5分）
從A、B、C、D四個選項中，找出其劃線部分與所給單詞的劃線部分讀音相同的選項，并在答題卡上將該項涂黑。
1. soft A. political B. common C. woman D. brother
2. precious A. police B. certainly C. condition D. official
3. trouble A. house B. proud C. soup D. enough
4. business A. custom B. minute C. summer D. butcher
5. developed A. pronounced B. mentioned C. excited D. demanded
第二節 語法和詞匯知識（共15小題；每題1分，滿分15分）
從A、B、C、D四個選項中，選出可以填入空白處的最佳選項，并在答題卡上將該項涂黑。
6．------Oh, I’ll go for the job interview now.
------______. I hope you’ll do well.
A. Well done B. Good luck
A. Good chance D. Hopefully
7．The teacher asked the two students to discuss the question in a low voice______ they should bother the others.
A. so that B. in case
C. in order that D. now that
8. We had ________nice dinner after the meeting with _______dishes of fish, meat , vegetables and dessert.
A. a; / B. the; the C. a; the D. /;the
9. All the people present at the conference agreed that the plan ____ by the old professor was well worth considering.
A. put away B. put off C. put forward C. put up
10. -----Do you remember to go to see a doctor tomorrow?
-----_______.
A. Got it B. Heard it C. Make it D. Taken it
11. Although many measures _____, the world’s economy is still going down.
A. are taken B. were taken
C. will be taken D. have been taken
12. It is reported that women_____ only 30% of the work force.
A. fill up B. bring up C. make up D. set up
13. ------Which of those electronic dictionaries do you like most?
------ .They are expensive and of little use.
A. None B. Neither C. All D. Both
14. -----Did you meet Jack at the airport yesterday afternoon?
-----No. When I got there, he _______.
A. went away B. goes away C. was going away D. had gone away
15. Most people are _____ bringing down the price of housing because it’s too high for them.
A. in favor of B. in honor of
C. in search of D. in charge of
16. _______was expected, only five people turned up at the party, _____disappointed the hostess very much.
A. As; which B. As; that C. It ; that D. It ; which
17. According to the school regulation, whoever cheats in examinations ______be severely punished.
A. can B. would C. shall D. need
18. The concert by Lang Lang was so well _______ that all the tickets had been sold out on the first three days last month.
A. received B. recognized C. admitted D. taken
19. The win in the
100-meter butterfly gave the American swimmer Michael Phelps eight gold medals
in
A. broken B. to break C. breaking D. being broken
20. -----He should have been warned of the danger.
------_______, but he wouldn’t listen to me .
A. So he had B. So had he C. So was he D. So he was
第三節：完形填空（共20小題；每小題1.5分，滿分30分）
閱讀下面短文，從短文后所給的四個選項（A、B、C和D）中選出可以填入空白處的最佳選項。
I’ve always had strong opinions of how love should be expressed, but others have their own ways of showing care.
What I 21 most about visiting my boyfriend’s parents is the loud tick（滴答聲）of the clock in the dinning room as we 22 ate our meal. With so little conversation I was quick to 23 his family as cold. When we got into the 24 to go home, his father suddenly appeared. 25 , he began to wash his son’s windscreen(擋風玻璃). I could feel he was a caring man through the glass.
I learned another lesson about love a few years later. My father often 26 me early in the morning. “Buy Xerox. It is a good share price（股價）,” he might say when I answered the phone. No pleasant 27 or inquiry about my life, just a financial directive(指示). This manner of his 28 me and we often quarreled. 29 one day, I thought about my father’s success in business and realized that his concern for my financial security（安全）lay behind his short 30 calls. The next time he called and told me to buy a stock(股票), I thanked him.
When my social style has conflicted with 31 of my friends, I’ve often felt 32 . For example, I always return phonecalls without delay and regularly contact with my friends. I expect the same from them.
I had one friend who rarely called, answering my message with short e-mails. I rushed to the 33 ― she wasn’t a good friend! My anger 34 as the holidays approached. But then she came to a party I 35 and handed me a present, a beautiful dress that I had fallen in love with when we did some window-shopping last month. I was 36 at her thoughtfulness, and regretful for how I’d considered her to be 37 . Clearly I needed to change my expectation of friends.
Far too often, I ignored their 38 expression, eagerly expecting them to do things in my 39 .This left me feeling unloved. Over the years, however, I’ve learned to 40 individual’s love signs and it has helped me to get on well with others.
21. A. admire B. enjoy C. value D. remember
22. A. excitedly B. nervously C. silently D. instantly
23. A. regard B. expect C. take D. believe
24. A. bus B. train C. car D. plane
25. A. Carelessly B. Carefully C. Proudly D. Coldly
26. A. visited B. interrupted C. warned D. telephoned
27. A. greeting B. meeting C. complaint D. explanation
28. A. interested B. angered C. encouraged D. surprised
29. A. But B. Besides C. Therefore D. So
30. A. afternoon B. morning C. evening D. night
31. A. one B. it C. that D. this
32. A. content B. excited C. curious D. disappointed
33. A. feeling B. suggestion C. judgment D. belief
34. A. disappeared B. grew C. helped D. declined
35. A. opened B. refused C. hosted D. invited
36. A. pleased B. doubtful C. upset D. shocked
37. A. uncaring B. dishonest C. unhappy D. dissatisfied
38. A. unique B. common C. pleasant D. familiar
39. A. opinion B. way C. mind D. life
40. A. send B. express C. give D. read
第二部分：閱讀理解（共25小題；第一節每小題2分,第二節每小題1分;滿分45分）
第一節 閱讀下列短文，從每題所給的四個選項（A、B、C和D）中，選出最佳選項，并在答題卡上將該項涂黑。
A
In 1988 , Mary Andersen was at the Miami airport checking in for a flight to Norway to be with her husband when she was told she wouldn’t be able to check her luggage without paying a $100 surcharge(超載).
Mary had no money as her new husband had
left for
“I was completely desperate and tried to think which of my things I could manage without.” Says Mary.
As tears ran down her face, a voice behind her said, “That’s okay, I’ll pay for her.”
Rather surprised，Mary turned around to see a tall man whom she had never seen before. He had a gentle and kind voice that was firm and decisive.
Although this happened twenty years ago, Mary still remembers the authority that radiated(發出)from the man.
Mary was pleased to bring her
luggage to
That man turned out to be Barack Obama.
Mary paid the money back to Obama the day she
joined her husband. At that time he had just finished his job as a poorly paid
community worker in
In the spring of 2006 Mary’s parents heard Obama was considering a run for president. They wrote a letter saying that they would support him. At the same time, they thanked Obama for helping their daughter 18 years earlier.
And Obama replied, “ I want to
thank you for the lovely things you wrote about me and for reminding me of what
happened at
41. Why did Mary feel completely desperate?
42. How did Mary feel when someone offered to help her?
A. Amazed. B. Puzzled. C. Delighted. D. Annoyed.
43. Mary asked the stranger to leave his name and address______.
A. in order to contact him later B. so that she could repay him
C. because he impressed her deeply D. because she fell in love with him
44. What’s the passage mainly about?
A. A letter from Barack Obama. B. Mary’s parents support Obama.
C. Obama helped a stranger 20 years ago. D. Mary was lucky to get help at the airport.
B
Positive thinkers admit when they feel frustrated(受挫折的) or depressed, they don't ignore it. But they don't blame themselves either. Instead, they try to understand the negative thoughts and feelings and counter(反擊) them with more positive ones.
So how do you stay positive, maintain motivated and sustain healthy behaviors? Here are some tips:
Look for a good role model. There is always someone who seems to be doing just what you want to be doing. Maybe they've scheduled exercise into their workday and switched from coffee to green tea. Learn from a successful friend, family member or colleague. Ask them how they keep healthy and follow in their footsteps.
Try some positive self-talk and avoid negative-talk. Take a minute to give yourself an ego boost. Repeat some motivational words out loud to yourself. Negative talk such as "I can't do it," "I'm fat," is dangerous for your well-being and healthy goals. Try to avoid the negative self-talk before it harms you. Remind yourself that you deserve happiness and can make positive changes.
Get support. Tell your friends and family about your healthy habits. It helps to have an encouraging network.
Reward yourself. Treat yourself to something for your healthy efforts. Take a nice bath, get a massage, and enjoy a new DVD or CD.
Have a plan. Making a plan to exercise or eat healthy lunches with a friend can mean the difference of sticking with your goals or falling off track. If you've planned for an activity, you'll likely stick with it. You may even find that writing down your goals and steps to achieve them can help you stay on track. Take it day by day or week by week. The process of writing down your personal action plan is a good way to keep you honest and watch your progress or failures.
45. By writing the text the author intends to _______.
A .offer some advice on how to stay positive
B. persuade readers to learn from a role model
C. provide some solutions to personal problems
D .inform readers of some tips on physical health
46. What does the phrase “to give yourself an ego boost” in Paragraph 4 mean?
A. to get lost in deep thought. B. to think about the hardships.
C. to check what mistake you made. D. to make you feel better about yourself.
47. Which of the following would the author Not agree to?
A. Saying some positive words to yourself helps you to feel good.
B. By staying with your companion you can avoid the negative-talk.
C. A successful friend, relative or colleague can be your role model.
D. Creating a helpful network is a good way to keep you motivated.
48. To make sure that you always stay on track, what should you do?
A. Eat out with your best friends. B. Relax yourself after a hard day.
C. Write down what you want to achieve D. Modify your plans as often as you can.
C
A device that stops drivers from falling asleep at the wheel is about to go through testing at Department of Transport laboratories and could go on sale within 12 months.
The system, called Driver Alert, aims to reduce deadly road accidents by 20% - 40% that are caused by tiredness. Airline pilots can also use it to reduce the 30% of all pilot-error accidents that are related to tiredness.
Driver Alert is based on a computerized wristband(手表帶). The device, worn by drivers or pilots, gives out a sound about every four minutes during a car journey. After each sound the driver must respond by squeezing（擠壓） the steering wheel (方向盤). A sensor in the wristband detects this pressing action and measures the time between the sound and the driver’s response.
Tiredness is directly related to a driver’s response time. Usually, a watchful driver would take about 400 milliseconds to respond, but once that falls to more than 500 milliseconds, it suggests that the driver is getting sleepy.
In such cases the device gives out more regular and louder sounds, showing that the driver should open a window or stop for a rest. If the driver’s response continues to slow down, the sounds become more frequent until a nonstop alarm warns that the driver must stop as soon as possible.
The device has been delivered to the department’s laboratories for testing. If these tests, scheduled for six months’ time, are successful, the makers will bring the product to market within about a year.
49. According to the text, Driver Alert ______.
A. aims to reduce tiredness-related accidents
B. has gone through testing at laboratories
C. aims to prevent drivers form sleeping
D. has been on sale for 12 months
50. How should a driver respond to the sounds from Driver Alert?
A. By sounding a warning. B. By touching the wristband.
C. By checking the driving time. D. By pressing the steering wheel.
51. We can learn form the text that the driver needs to stop for a break when his response time is ______.
A. about 400 milliseconds B. below 500 milliseconds
C. over 500 milliseconds D. about 4 minutes
52. When the driver gets sleepy while driving, Driver Alert ______.
A. moves more regularly B. stops working properly
C. opens the window for the driver D. sounds more frequently and loudly
D
Hotel Reservations
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A．Online Reservations
Enter your travel dates and the number of guests below to book your room online now.
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You may make reservations for a maximum of 4 guests per room. For requests of 10 rooms or more, please refer to Group Accommodations.
B．Reservations By Phone
If you prefer to reserve by phone, please call:
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Hours (Hawaii Standard Time):
Monday to Friday:
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C. Reservations By E-mail
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Submitting an e-mail request does not guarantee a reservation. For immediate confirmation and booking, please use online reservations engine above.
53. What is the purpose of writing the passage?
A. To show the importance of science.
B. To introduce a new hotel.
C. To attract more tourists to the hotel.
D. To make the trip for tourists.
54. If you want an immediate booking, you’d better use“ ”.
A. Online Reservations B. Reservations By Phone
C. Reservations By E-mail D. Reservations By Letter
55. From the passage we may infer the hotel is in __________ .
A．Canada B. mainland America C. French D. Hawaii
56. If you want to book a package you have to __________ . .
A. submit an e-mail reservations request
B. make sure of your check-in and check-out dates
C. refer to Group Accommodations
D. wait for further notice
E
To get an extra 14 years of life, don’t smoke, eat lots of fruits and vegetables, exercise regularly and drink alcohol in a proper amount. That is according to a study published this Monday in the Public Library of Science Medicine Journal.
After
tracking more than 20,000 people aged 45-79 years in the
“We’ve
known for a long time that these behaviors are good things to do, but we’ve not
seen this benefit before, ” said Susan Jebb, head of Nutrition and Health at
Study participants（參與者）scored a point each for not smoking, regular physical activity, eating five servings of fruits and vegetables a day and moderate alcohol intake.
Public health experts said they hoped the study would inspire governments introduce policies helping people to adopt these changes. But because the study only observed people rather than testing specific changes, it would be impossible to conclude that people who suddenly adopted these healthy behaviours would surely gain 14 years.
“We can’t say that any person could gain 14 years by doing these things,” said Doctor Tim Armstrong, a physical activity expert at the World Health Organization. ”The 14 years is an average across the population of what’s theoretically(理論上)possible.”
“Most people know that things like a good diet matter and that smoking is not good for them”, Susan Jebb said, ”We need to work on providing people with much more practical support to help them change.”
57. Which of the following doesn’t belong to the four healthy habits?
A. Eating five servings of fruits and vegetables a day.
B. Doing proper exercise in the morning every day.
C. Having a cigarette before going to bed every day.
D. Drinking alcohol in the proper amount every day.
58. We can learn from the passage that_____.
A. the study observed people as well as tested specific changes
B. Susan Jebb did not take part in the study
C. there is no need for people under 45 adopt these good habits
D. only those from first class can benefit from these healthy behaviours
59. What can be inferred from the passage?
A. Governments should take measures to help people change their bad habits.
B. People
aged 45-79 have bad habits in the
C. All the people are well aware of the harm of their bad habits.
D. People have adopted the four healthy habits after knowing they’re good.
60. What would be the best title for this passage?
A. Smoking and Drinking Cuts You 14 Years
B. Healthy Habits Could Gain You Extra 14 years
C. A New Way of Keeping Healthy
D. Smoking and Drinking Harms Your Health
第二節：根據對話內容,從對話或所給的選項中選出能填入空白處的最佳選項.選項中有兩個為多余選項.
A: Good afternoon. Customer Service.
B: Good afternoon. May I speak to the manager, please?
A: ____61_____
B: I’ve bought one of your tape recorder, but it’s stopped working
A: _____62____.
B: Last Sunday. But it stopped the day before yesterday.
A: ______63_____
B: From your main department
A: How much did you pay for it?
B: ______64_____
A: Did you call the store where you bought it?
B: Yes , I did____65_____
A:I see. I’ll call the manager myself and tell him to change it for you.
B: Thank you. Bye.
A: Bye.
A. Originally, it was ?50, but I bought it in a sale ?40
B. Hold on a minute, please.
C. And , where did you buy it?
D. But the manager said that I couldn’t change it.
E. Speaking.
F. When did it break down?
G. When did you buy it?
第II卷
第三部分：寫作（共三節，滿分55分）
第一節 ：單詞拼寫(共10小題;每小題1分,滿分10分)
根據下列句子及所給漢語注釋, 在句子右邊的橫線上寫出空缺處各單詞的正確形式. (每空只寫一詞)
66. If you knock into somebody, you should __________（道歉）to him. 66______
67. While Mary worked in the ________(廚房) , she talked to Henry, but he was not listening.
67_______
68. Stick stamps on the ________(信封) and post the letters. 68_______
69. When I came to the riverside, I found a boy __________(掙扎) in the water. 69________
70. Do you know how many countries belong to _________（歐洲）Union？ 70________
71. I’m afraid I can’t sing the song, for it’s ____ (超出) the range of my voice. 71_______
72.The applicants waited _______(耐心) for the final decision of the company. 72______
73. People are _______(禁止) to help those who have broken the law. 73________
74.The doctor said his _______(體溫) was normal, and that he just lacked a good rest.74________
75.Is it _________(方便) for you if I come to see you tomorrow afternoon? 75_______
第二節：短文改錯（共10小題，每小題1.5分，滿分15分）
此題要求改正所給短文中的錯誤。對標有題號的第一行作出判斷：如無錯誤，在該行右邊橫線上畫一個勾（√）；如有錯誤（每行只有一個錯誤），則按下列情況改正：
此行多一個詞：把多余的詞用斜線（\）劃掉，在該行右邊橫線上寫出該詞，并也用斜線劃掉。
此行缺一個詞：在缺詞處加一個漏字符號（∧），在該行右邊橫線上寫出該加的詞。
此行錯一個詞：在錯的詞下畫一橫線，在該行右邊橫線上寫出改正后的詞。
注意：原行沒有錯的不要改。
Dear editor,
I am a high school student. A few days before, 76_______
one of my very good friend told me that he was going 77_______
to stop the school. He said that he wanted to start his 78_______
own business. I tried best to get him to change his mind, 79_______
but I failed.
I know it is difficult of him to change his mind. 80_______
He is not doing so good in his studies, yet I want to 81_______
insist that I give it a try. The process is more 82_______
important than the results. Now there are only 60 days 83_______
left before that test. I am not sure that his decision is 84_______
right or wrong . I needed your advice. 85_______
Yours,
Li Hua
第三節：書面表達(滿分30分)
假設你是李華，你的一位美國筆友Robert寫E-mail問及你高考后暑假的安排，請根據以下要點，寫一封E-mail回復他, 可以適當增加細節。
內容要求：1. 學開車 2. 讀名著，開拓視野
3. 強身健體 4. 幫父母做家務
5．可能的話，參加社會實踐，勤工儉學
注意：1.根據以上內容寫一篇短文，不要逐句翻譯。
2.可適當增加細節以使行文連貫。
3. 詞數：120個左右。開頭已給出，不計詞數。
Dear Robert:
How time flies!____________________________________________________________
__________________________________________________________________________
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Looking forward to hearing from you, telling me about your arrangements of vacation.
Best wishes!
Yours, Li Hua
2009年甘肅省河西五市高三第二次聯考
2008-2009高三第一次調考化學試卷
本試卷分為第1卷（選擇題）和第Ⅱ卷（非選擇題）兩部分。共100分，時間90分鐘。
注意事項：
1．所有答案均寫在第II卷上。
2．答題前，考生務必將自己的“姓名”、“班級”和“學號”“座號”寫在相應的位置上；
3．考試結束，只交答題卡和第II卷。
4．可能用到的原子量：H-1；O-16；N-14；Al-27；S-32；Na-23
Ⅰ卷
一.選擇題（本題包括17小題，每小題3分，共51分，每小題只有一個選項符合題意）
1．下列反應不屬于氧化還原反應是是：
A．Cl2 + H2O == HClO + HCl B.3CO + Fe2O3 = 2Fe + 3CO2
C. CaCO3 + SiO2 == CaSiO3+CO2
D.3CuS + 8HNO3 = 3Cu(NO3)2 + 2NO + 2S +4 H2O
2．“和平使命―
A.能全部透過半透膜 B.有丁達爾現象
C.所得物質屬于純凈物 D.所得物質一定是濁液
3．下列說法中正確的是
①離子化合物中可能含有共價鍵，②構成單質分子的微粒一定含有共價鍵，③共價化合物中可能含有離子鍵，④由非金屬元素組成的化合物不一定是共價化合物，⑤離子化合物中只含有離子鍵， ⑥不同的三種元素組成的多原子化合物中一定有離子鍵，⑦共價化合物中不含有離子鍵，⑧兩個非金屬原子間不可能形成離子鍵
A. ①④⑦⑧ B. ②③⑤⑥ C. ①②⑤⑧ D. ③④⑥⑦
4．以NA表示阿伏加德羅常數，下列說法中正確的是
A..電解食鹽水若產生
B.0.1molNa與O2氣在一定條件下生成和Na2O和Na2O2混合物時，失去的電子數為0.1NA
C
D.標準狀況下
5．下列說法錯誤的是
A、原子晶體中只存在非極性共價鍵
B、分子晶體的狀態變化，只需克服分子間作用力
C、金屬晶體通常具有導電、導熱和良好的延展性
D、離子晶體在熔化狀態下能導電
6．下列物質性質的變化規律，與共價鍵的鍵能大小有關的是
A.F2、Cl2、Br2、I2的熔點、沸點逐漸升高
B.HF的沸點比HCl、HBr、HI的沸點要高
C.金剛石的硬度、熔點、沸點都高于晶體硅
D.NaF、NaCl、NaBr、NaI的熔點依次降低
7．向含有下列離子的溶液中，通入適量的氯氣會引起離子濃度減少的是
①
②
③OH－ ④Fe2+
A.①② B. ③④ C. ①②③ D. ①②③④
8．下列反應中，改變反應物用量或濃度，不會導致反應產物改變的是
A．CO2通入氫氧化鈉溶液 B．硫酸中加入鋅粉
C．鹽酸與偏鋁酸鈉溶液反應 D．鐵粉在硫蒸氣中燃燒
9．下列離子方程式書寫正確的是( )
A.在氯化鋁溶液中加入過量氨水 Al3＋＋3OH－==Al(OH)3↓
B.在硫酸銅溶液中加入過量氫氧化鋇溶液 Ba2＋＋
==BaSO4↓
C.在澄清石灰水中通入過量二氧化碳 OH－＋CO2==
D.在碳酸氫鈣溶液中加入過量氫氧化鈉溶液
Ca2+＋＋OH－==CaCO3↓+H2O
10．下列反應離子方程式正確的是
A．大理石溶于醋酸溶液： CaCO3 + 2H+==Ca2+ + CO2 ↑+ H2O
B．氯氣通入冷的氫氧化鈉溶液中： 2Cl2 + 2OH- ＝ 3Cl- + ClO-+ H2O
C．向澄清石灰水中加入少量小蘇打溶液： Ca2+ + OH-+ HCO3- ＝CaCO3↓+ H2O
D．氨水中通入過量二氧化硫： 2NH3?H2O + SO2 ＝ 2NH4+ + SO32-+ 2H2O
11．下圖是電解飽和NaCl溶液的實驗裝置, X、Y都是惰性電極, a是飽和NaCl溶液, 同時在兩邊各滴入幾滴酚酞試液,下列有關該實驗正確的說法是
A．X電極為陽極，Y電極為陰極
B．X電極附近溶液變紅色，且有刺激性氣味氣體產生
C．若將兩電極產生的氣體收集起來，X電極得到的氣體與Y電極得到的氣體之比略大于1：1
D．電解后，將溶液混勻，電解前后溶液的pH未發生變化
12．鎳鎘（Ni－Cd）可充電電池在現代生活中有廣泛應用，它的充放電反應按下式進行： Cd（OH）2+2Ni（OH）2
Cd+2NiO（OH）+2H2O。由此可知，該電池放電時的負極材料是（ ）
A.Cd（OH）2 B.Ni（OH）2 C.Cd D.NiO（OH）
13．
A.C(s)+
O2(g)==CO(g)；△H=-393.5 kJ/mol
B.2H2(g)+O2(g)==2H2O(g)；△H=+571.6 kJ/mol
C.CH4(g)+2O2(g)==CO2(g)+2H2O(g)；△H=-890.3 kJ/mol
D.
C6H12O6(s)+3O2(g)
=== 3CO2(g)+3H2O(1)；△H=-1400 kJ/mol
14．化學用語是學習化學的重要工具，下列用來表示物質變化的化學用語中，正確的是：（ ）
A.電解飽和MgCl2溶液
B.過量氯氣通入溴化亞鐵溶液中
3Cl2+2Fe2++4Br_====6Cl-+2Fe3++2Br2?
C.向沸水中滴加飽和的氯化鐵溶液制氫氧化鐵膠體
Fe3+ + 3H2O = Fe(OH)3 ↓+ 3H+
D
15．在鋅和很稀的硝酸充分反應，當消耗鋅與硝酸的物質的量比為1:2.5時，除生成硝酸鋅和水之外還生成另一種物質，該物質可能是（ ）
①NO2 ②.N2O ③.NO ④.NH4NO3
A.①② B.①③ C.②④ D.③④
16．向含有0．078molFeCl2的溶液中通入0．009molCl2，再向其中加入含0．01molX2O72-的酸性溶液，使溶液中的Fe2+恰好完全被氧化，且X2O72-被還原為Xn+，則n值為：（ ）
A．2
B．
17.Cu2S與一定濃度的HNO3反應，生成Cu(NO3)2、CuSO4、NO2、NO和H2O，當NO2和NO的物質的量之比為1:1時，實際參加反應的Cu2S與HNO3的物質的量之比為（ ）
A.1:7 B.1:9 C.1:5 D.2:9
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2009年甘肅省河西部分普通高中高三第二次聯合考試
語 文
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