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nguyenthuy111976
2 năm trước
Cho 1,6 gam đồng (II) oxit tác dụng với 100 gam dung dịch axit sunfuric có nồng độ 20%. a) Viết phương trình hóa học. b) Tính nồng độ phần trăm của các chất có dung dịch sau khi phản ứng kết thúc.
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I-Make the letter A, B, C or D on your answer sheet to indicate the correct answer to each of following questions (4.0 points) Question 1: A spacewalk occurs........an astronaut gets out of a vehicle while in space to do science experiments, or conduct repairs. A. who B. what C.when D.whom Question 2: Some people say that the role of family....to fit the development of society. A. will be changed B. is changed C. changing D. will change Question 3: Teachers provide a model for children...... A. imitating B. imitate C. to imitate D. imitated Question 4: They keep changing the decoration.....they can attract more young people. A. so that B. because C. although D. in spite of Question 5: I've......the product catalogue and decided to buy this table. A. looked through B. closed down C. found out D. turn off Question 6: Emergency teams are still clearing the.....from the plane crash. A. debris B.dust C. piece D. part Question 7: I hope you.........when arrive at 8 p.m. today! A.didn't work B. won't be working C. don't work D. aren't working Question 8: Your car is.....than mine. A. very bigger B. much more bigger C. more bigger D.much bigger Question 9: Mrs. Johnson put salt into the bowl of sugar by mistake,.......? A. doesn't she B. did she C. didn't she D.isn't she Question 10: It's very hot today. I wish I.....in a swimming pool now. A. am B. were C. can D. will be Question 11: Getting to the village is a very.........journey. A. interesting B. interested C. interest D. interests Question 12: My village lies near the......of the mountain and by the river. A. foot B. leg C. feet D. legs Question 13: What do you think about his.....of coins. A. collect B. collector C. collection D. collective Question 14: There is a small bamboo....at the entrance to the village. A. forest B. forestation C. forest ranger D. forestry Question 15: Minh is............the most successful student in my class. A.so long B.by how C. so now D.by far Question 16:A......is a solid figure or object, made by carving or shaping wood, stone,clay, etc. A.painting B.sculpture C.medal D.picture Question 17: Ho Chi MinhCity has been divided into twenty-four.....divisions since December 2003. A.administer B.administration C.administrative D.administrator Question 18: The new sports......has six tennis courts. A.complex B.match C.medium D.game by mistake. ...of coins? Question 19: Lan couldn't decide.....to work with on the project. A.who B.what C.how D.when Question 20:.............I was talking to my teacher, my friends were waiting outside the classroom. A. In order that B.While C. Although D. So that C. READING I. Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks. (1.0 point) Facebook appears to be recovering from a more than 14-hour disruption to all of its products that left them mostly (31).........across the world. The company's main social network, its two messaging apps and image-sharing site Instagram were all affected. Facebook has yet to offer an explanation for the outage. The last time Facebook had a disruption of this magnitude was (32).......... 2008, when the site had 150 million users - compared with around 2.3 billion monthly users today. The problems began yesterday afternoon, and only showed real signs of recovery this morning. They meant core platforms many people rely on every day to communicate were rendered mostly useless. "We're aware that some people are currently (33).......... trouble accessing the Facebook family of apps," Facebook said in a statement, posted on Twitter. "We're working to resolve the issue as soon as possible." Facebook's apps seemed to be recovering on Thursday morning, with Instagram announcing it was back. In response to rumours posted on other (34)...........networks, the company said the outages were not a result of a Distributed Denial of Service attack, known as DDoS - a type of cyber-attack (35)........... involves flooding a target service with extremely high volumes of traffic. Question 31: A. uncomfortable B. unaffordable C. inaccessible D. unlucky Question 32: A. in B. at C. from D. of

D. WRITING I. Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions. ((1.0 point) Question 41: Although he was tired, he finished doing his homework. A. In spite his tiredness, he finished doing his homework. B. In spite of his tiredness, he finished doing his homework. C. In spite of he was tired, he finished doing his homework. D. In spite his tired, he finished doing his homework. Question 42: He is a much slower speaker than my brother. A. He speaks much more slowly than my brother. B. He doesn't speak much more slowly than my brother. C. He speaks much more quickly than my brother. D. He doesn't speak much more quickly as my brother. Question 43: They often went to school by bike when they were young. A. They used go to school by bike when they were young. B. They used to going to school by bike when they were young. C. They used to go to school by bike when they were young. D. They used to went to school by bike when they were young. Question 44: She has taught her children to play piano for 4 years. A. She started teaching her children to play piano 4 years ago. B. She started to teaching her children to play piano 4 years ago. C. She started teaching her children to play piano for 4 years ago. D. She started teaching her children to play piano since 4 years. Question 45: It's a pity I can't cook as well as my mom. A. I wish I could cook as well as my mom. B. I wish I can cook as well as my mom. C. I wish I could cook as good as my II. Mark the letter A, B, C or D on your answer sheet to indicate the sentence that can be made from the cues given. (1.0 point) Question 46: Neil Armstrong / who / first/walk/moon/live/USA/. A. Neil Armstrong, who first walked on the moon, lived in the USA. B. Neil Armstrong who first walked in the moon lived in the USA. C. Neil Armstrong, who first walks on the moon lives in the USA. D. Neil Armstrong who first has walked in the moon lived in the USA. Question 47: we/celebrate/ Independence / Day / second / September. A. We celebrate Independence Day the second of September. B. We celebrate our Independence Day the second of September. C. We celebrate Independence Day on second September. D. We celebrate our Independence Day on the second of September. Question 48: Flowers/ be/ important /gifts/ Mother's Day /. A. Flowers are important gifts on Mother's Day. B. Flowers are important gifts of Mother's Day. C. Flowers are an important giftst of Mother's Day. D. Flowers is important gifts of Mother's Day. Question 49: My brother/ wish / he/speak English / fluent / as/native speakers. A. My brother wishes he could speak English as fluently as native speakers. B. My brother wish he could Speak English fluently as native speakers. C. My brother wish he could speak English as fluent as native speakers. D. My brother wishes he could speak English as fluent as native speakers. Question 50: Their hands/wash and dry / on a towel. A. Their hands have washed and dry on a towel. B. Their hands have been washed and dry on a towel. C. Their hands have been wash and dried on a towel. D. Their hands have been washed and dried on a towel.

II. Read the following passage and mark correct answer to each of the questions. (1.0 point) Today, in many parts of the world, it is customary for people to shake hands upon meeting as gesture of good Today, will. Originally; however, the practice of shaking hands has a more practical purpose. Shaking hands originated in medieval times. In those days, when a man "came on" a stranger, he would automatically reach for his often sword with his right hand, in case he had to use the weapon to defend himself. Sometimes, both parties found themselves circling around each other, weapons in hand, until it was mutually agreed that the weapons could be laid aside. Then, the two parties extended their right hands to show they had no weapons, and clasped" them". This was the beginning of the handshake. The custom of shaking hands is not a universal one. In the Orient, people have, for centuries, clasped their own hands in front of them upon meeting to show that they held no weapons. In France, a custom developed in which people who met would kiss each other on both cheeks. The natives of some South Seas islands greet by rubbing noses. Question 36. At first the purpose of shaking hands was......... A. to show a good relationship with each other. B. to show that there were no weapons in hands. C. to show that both parties were ready for a fight. D. a gesture of good will. Question 37. The word "them" refers to........ A. the two parties' weapons B. the two parties' left hands C. the two parties D. the two parties' right hands. Question 38. According to the passage, the practice of shaking hands....... A. was used to extend greetings B. used to be popular, but now it is out of date. C. is replaced by other customs in some countries. D. is considered not to be very polite. Question 39. The phrase 'came on' in the second paragraph can be best replaced by.......... A. waited for B. visited C. attacked D. happened to meet. Question 40. Which of the following is NOT TRUE about the handshake? A. It happened for the first time very long time ago. B. It is a gesture of good will D. It is one of the social custom. C. It is very popular all over the world D. It is one of the social custom

I-Make the letter A, B, C or D on your answer sheet to indicate the correct answer to each of following questions (4.0 points) Question 1: A spacewalk occurs........an astronaut gets out of a vehicle while in space to do science experiments, or conduct repairs. A. who B. what C.when D.whom Question 2: Some people say that the role of family....to fit the development of society. A. will be changed B. is changed C. changing D. will change Question 3: Teachers provide a model for children...... A. imitating B. imitate C. to imitate D. imitated Question 4: They keep changing the decoration.....they can attract more young people. A. so that B. because C. although D. in spite of Question 5: I've......the product catalogue and decided to buy this table. A. looked through B. closed down C. found out D. turn off Question 6: Emergency teams are still clearing the.....from the plane crash. A. debris B.dust C. piece D. part Question 7: I hope you.........when arrive at 8 p.m. today! A.didn't work B. won't be working C. don't work D. aren't working Question 8: Your car is.....than mine. A. very bigger B. much more bigger C. more bigger D.much bigger Question 9: Mrs. Johnson put salt into the bowl of sugar by mistake,.......? A. doesn't she B. did she C. didn't she D.isn't she Question 10: It's very hot today. I wish I.....in a swimming pool now. A. am B. were C. can D. will be Question 11: Getting to the village is a very.........journey. A. interesting B. interested C. interest D. interests Question 12: My village lies near the......of the mountain and by the river. A. foot B. leg C. feet D. legs Question 13: What do you think about his.....of coins. A. collect B. collector C. collection D. collective Question 14: There is a small bamboo....at the entrance to the village. A. forest B. forestation C. forest ranger D. forestry Question 15: Minh is............the most successful student in my class. A.so long B.by how C. so now D.by far Question 16:A......is a solid figure or object, made by carving or shaping wood, stone,clay, etc. A.painting B.sculpture C.medal D.picture Question 17: Ho Chi MinhCity has been divided into twenty-four.....divisions since December 2003. A.administer B.administration C.administrative D.administrator Question 18: The new sports......has six tennis courts. A.complex B.match C.medium D.game by mistake. ...of coins? Question 19: Lan couldn't decide.....to work with on the project. A.who B.what C.how D.when Question 20:.............I was talking to my teacher, my friends were waiting outside the classroom. A. In order that B.While C. Although D. So that C. READING I. Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks. (1.0 point) Facebook appears to be recovering from a more than 14-hour disruption to all of its products that left them mostly (31).........across the world. The company's main social network, its two messaging apps and image-sharing site Instagram were all affected. Facebook has yet to offer an explanation for the outage. The last time Facebook had a disruption of this magnitude was (32).......... 2008, when the site had 150 million users - compared with around 2.3 billion monthly users today. The problems began yesterday afternoon, and only showed real signs of recovery this morning. They meant core platforms many people rely on every day to communicate were rendered mostly useless. "We're aware that some people are currently (33).......... trouble accessing the Facebook family of apps," Facebook said in a statement, posted on Twitter. "We're working to resolve the issue as soon as possible." Facebook's apps seemed to be recovering on Thursday morning, with Instagram announcing it was back. In response to rumours posted on other (34)...........networks, the company said the outages were not a result of a Distributed Denial of Service attack, known as DDoS - a type of cyber-attack (35)........... involves flooding a target service with extremely high volumes of traffic. Question 31: A. uncomfortable B. unaffordable C. inaccessible D. unlucky Question 32: A. in B. at C. from D. of Question 33: A. producing B. having C. providing D. keeping Question 34: A. social B. socialize C. society D. socializing Question 35: A. what B. who C. that D. whom

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