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2 tháng 4 2017

Đáp án : B

Trọng âm của từ này rơi vào âm tiết thứ 3, các từ còn lại rơi vào âm tiết thứ 2.

 Read the following passage and choose the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions from 33 to 42.     A useful definition of an air pollutant is a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetations, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England...
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Read the following passage and choose the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions from 33 to 42.    

A useful definition of an air pollutant is a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetations, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled-a far cry from the extensive list of harmful substances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions.     Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and nitrogen oxides, are found in nature. As the Earth developed, the concentrations of these pollutants were altered by various chemical reactions; they became components in biogeochemical cycle. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil on a global basis, nature's output of these compounds dwarfs that resulting form human activities. However, human production usually occurs in a localized area, such as a city.     In this localized regions, human output may be dominant and may temporarily overload the natural purification scheme of the cycle. The result is an increased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a substance to be a pollutant; in fact the numerical value tells us little until we know how much of an increase this represents over the concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm.

According to the passage, which of the following is true about human-generated air pollution in localized regions?

 

A. It can be dwarfed by nature's output of pollutants in the localized region. 

B. It can overwhelm the natural system that removes pollutants. 

C. It will damage areas outside of the localized regions. 

D. It will react harmfully with naturally occurring pollutants.

1
27 tháng 6 2017

Chọn B

Dựa vào câu 1 đoạn 4 “human output may be dominant and may temporarily overload the natural purification scheme of the cycle” rác thải của con người có thể quá tải với cơ chế làm sạch tự nhiên. -> nó lấn át hệ sinh thái tự nhiên cái mà làm sạch chất ô nhiếm.

23 tháng 7 2018

Đáp án C

when: khi nào                                                if: nếu như, liệu

what: cái gì                                          why: tại sao

=> đáp án C

Tạm dịch: Cô ấy hỏi tôi đang nhìn cái gì.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.The pain of a migraine headache can virtually disable a person who suffers from it. Millions and millions of people suffer from migraines, although many of them do not even recognize that a migraine is different from a regular headache. A migraine is not at all the same as a normal headache, and it seems to have a very physical cause.One symptom of a migraine...
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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

The pain of a migraine headache can virtually disable a person who suffers from it. Millions and millions of people suffer from migraines, although many of them do not even recognize that a migraine is different from a regular headache. A migraine is not at all the same as a normal headache, and it seems to have a very physical cause.

One symptom of a migraine is a precursor, which is a visual aura before an attack. Yet only about a third of patients actually experience that, and it is, therefore, not a requirement in the diagnosis. Other symptoms include increased pain when a person moves, nausea, and sensitivity to light and sound.

Scientists now believe that migraines are caused, not by abnormal blood vessels as previously believed, but instead by a unique electrical disorder of brain cells. Physicians used to treat migraines with medicine to constrict blood vessels because of the belief that dilated blood vessels were the cause. The new research has been enhanced by imaging devices that allow scientists to watch patients’ brains during an attack. The results show that sufferers have abnormally excitable neurons, or brain nerve cells. Prior to the attack, the neurons suddenly fire off electrical pulses at the back of the brain, which ripple like waves on a lake after a stone hits the water. They ripple across the top and then the back of the brain, ultimately affecting the brain stem where the pain centers are located. The pain then generates possibly from the brain stem itself or from blood vessels inflamed by the rapidly changingblood flow, or perhaps from both.

Scientists have experimented by applying a powerful magnet to stimulate the neurons and discovered that some people’s brains react differently than others’. When stimulation was applied to the brains of people who had suffered migraines, they saw the initial aura, and some actually suffered migraines. When the same stimulation was applied to the brains of people who had never suffered migraines, they realized no effect and the neurons showed no change.

Scientists and doctors continue to work on the research in an attempt to find the perfect treatment. It is considered important to treat migraines because it is believed that prolonged untreated attacks could cause physical changes in the brain leading to chronic pain.

The word it in paragraph 1 refers to _________.

A. migraine          

B. person             

C. pain                          

D. suffering

1
12 tháng 8 2018

Đáp án : A

“The pain of a migraine headache can virtually disable a person who suffers from it.” Cơn đau nửa đầu có thể thật sự tổn thương người chịu đưng nó-> it là A migraine.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks.Nowadays people are more aware that wildlife all over the world is in danger. Many species of animals will become (31)_____ if we do not make an effort to protect them. There are many reasons for this. In some cases, animals are (32) _____for their fur or for other valuable parts of their bodies. Some birds, such as parrots, are...
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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks.

Nowadays people are more aware that wildlife all over the world is in danger. Many species of animals will become (31)_____ if we do not make an effort to protect them. There are many reasons for this. In some cases, animals are (32) _____for their fur or for other valuable parts of their bodies. Some birds, such as parrots, are caught alive and sold as pets. For many animals and birds the problem is that their habitat - the place where they live - is (33) _____ . More land is used for farms, for houses or industry, and there are fewer open spaces than there once were. Farmers use powerful chemicals to help them grow better crops, but these chemicals pollute the environment and (34) _____ wildlife. The most successful animals on earth - human beings - will soon be the only ones (35) _____ , unless we can solve this problem

Điền ô số 31

A. disappeared 

B. vanished

C. empty

D. extinct

1
22 tháng 9 2018

Đáp án D

Giải thích: Ở dòng đầu tiên có chữ “in danger” (đang gặp nguy hiểm) và “if we do not make an effort to protect them” (nếu chúng ta không nỗ lực để bảo vệ chúng) => chúng bị tuyệt chủng.

A. biến mất (PII)

B. biến mất (PII)

C. trống rỗng (adj)

D. tuyệt chủng (adj)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questionsThe custom of paying a bride price before marriage is still a well-established part of many African cultures. In paying a bride price, the family of the groom must provide payment to the family of the bride before the marriage is allowed. The bride price can vary greatly from culture to culture in Africa. In the Zulu and Swazi tribes of southern...
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Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

The custom of paying a bride price before marriage is still a well-established part of many African cultures. In paying a bride price, the family of the groom must provide payment to the family of the bride before the marriage is allowed. The bride price can vary greatly from culture to culture in Africa. In the Zulu and Swazi tribes of southern Africa, the bride price often takes the form of cattle. In Western African, kola nuts, shells, and other goods are often used for the payment of the bride price. The actual payment of money sometimes takes place, but the payment of goods is more frequent. The amount of paid in a bride price can also vary. In modern times, the bride price is occasionally quite small and its value is mainly symbolic. However, the bride price can still be quite high, especially among prominent or highly traditional families.

There are a number of justifications used to explain the payment of bride price. The first is that the bride price represents an acknowledgement of the expense the bride’s family has gone in order to raise her and bring her up as a suitable bride for the groom. It also represents payment for the loss of a family member, since the bride will officially become a member of her husband’s family and will leave her own. On a deeper level the bride price represents payment for the fact that the bride will bring children into the family of the groom, thereby increasing the wealth of the family. This concept is reinforced by the fact that the bride price must often be returned if the bride fails to bear children.

The payment of the bride price has quite a number of effects on African society. First, the payment of bride price acts to increase the stability of African family structures. Sons are dependent on their fathers and older relatives to help them pay the bride price of their wives, and this generally leads to greater levels of obedience and respect. The negotiations between the two families concerning the bride price allow the parents and other family members to meet and get to know one another before the marriage. Finally, since the bride price must often be repaid in case of divorce, the bride’s family often works to make sure that any marital problems are solved quickly. Bride prices also work as a system of wealth distribution in African cultures. Wealthier families can afford to support the marriage of their son, and thus their wealth is transferred to other families.

The author uses the word “marital” to indicate that the problems are related to____.

A. money             

B. laws                 

C. pregnancy                 

D. marriage

1
30 tháng 9 2017

Đáp án : D

Martial= marriage=  thuộc về vợ chồng, pregnancy= mang thai.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.    Most journeys in Britain and the US are made by road. Some of these are made on public transport but most are by private car.    In Britain many people rely on their cars for daily local activities, e.g. getting to work, doing the shopping, and visiting friends. People living in urban areas may use buses, trains or, in London, the Underground, to get to...
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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

    Most journeys in Britain and the US are made by road. Some of these are made on public transport but most are by private car.

    In Britain many people rely on their cars for daily local activities, e.g. getting to work, doing the shopping, and visiting friends. People living in urban areas may use buses, trains or, in London, the Underground, to get to city centres, mainly because traffic is often heavy and it is difficult to find anywhere to park a car. Some places in the country may have a bus only two or three times a week so people living there have no choice but to rely on their cars.

    In the US large cities have good public transportation systems. The El railroad in Chicago and the underground systems of New York, Boston, San Francisco and Washington, DC are heavily used. Elsewhere, most Americans prefer to use their cars. Families often have two cars and, outside major cities, have to drive fairly long distances to schools, offices, shops, banks, etc. Many college and even high-school students have their own cars.

    Long-distance travel in Britain is also mainly by road, though railways link most towns and cities. Most places are linked by motorways or other fast roads and many people prefer to drive at their own convenience rather than use a train, even though they may get stuck in a traffic jam. Long- distance coach/bus services are usually a cheaper alternative to trains, but they take longer and may be less comfortable. Some long-distance travel, especially that undertaken for business reasons, may be by air. There are regular flights between regional airports, as well as to and from London. A lot of freight is also distributed by road, though heavier items and raw materials often go by rail.

    In the US much long-distance travel is by air. America has two main long-distance bus companies, Greyhound and Trailways. Amtrak, the national network, provides rail services for passengers. Private railway companies such as Union Pacific now carry only freight, though in fact over 70% of freight goes by road.

 

    The main problems associated with road transport in both Britain and the US are traffic congestion and pollution. It is predicted that the number of cars on British roads will increase by a third within a few years, making both these problems worse. The British government would like more people to use public transport, but so far they have had little success in persuading people to give up their cars or to share rides with neighbours. Most people say that public transport is simply not good enough. Americans too have resisted government requests to share cars because it is less convenient and restricts their freedom. Petrol/gasoline is relatively cheap in the US and outside the major cities public transport is bad, so they see no reason to use their cars less.

Which of the following is NOT true according to the passage?

A. Few college students in the US have their own cars

B. Families in the US often have more than one car

C. Most Americans prefer to drive their cars outside large cities

D. The underground systems are popular in some major US cities

1
7 tháng 1 2017

Đáp án A

Điều gì là không đúng dựa theo đoạn văn?

A. Một vài sinh viên đại học ở nước Mỹ có xe hơi.

B. Các gia đình ở Mỹ thường có nhiều hơn một xe ô tô.

C. Hầu hết người Mỹ thích lái xe ô tô của hộ ra ngoài các thành phố lớn

D. Hệ thống tàu điện ngầm phổ biến ở một vài thành phố lớn ở Mỹ.

Giải thích: Thông tin của đáp án A ở câu: “Many college and even high-school students have their own cars.” (Rất nhiều sinh viên Đại học và thậm chí học sinh trung học phổ thông có xe hơi riêng.) >< Few college (một vài sinh viên)

Dẫn chứng của đáp án B: “Families often have two cars” (Các gia đình thường có 02 xe hơi).

Dẫn chứng của đáp án C: “Families often have two cars and, outside major cities, have to drive fairly long distances to schools, offices, shops, banks, etc” (Các gia đình thường có 02 xe hơi, và khi ra ngoài thành phố, họ thường lái xe khá xa để đi đến trường học, văn phòng, cửa hàng, ngân hàng v.v...)

Dân chứng của đáp án D: “In the US large cities have good public transportation systems. The El railroad in Chicago and the underground systems of New York, Boston, San Francisco and Washington, DC are heavily used” (Ở các thành phố lớn trên nước Mỹ có hệ thống phương tiện giao thông công cộng tốt. Hệ thống tàu hỏa ở Chicago và hệ thống tài điện ngầm ở NY, Boston, San Francisco và Washington DC đều được sử dụng nhiều và rộng rãi) = popular

6 tháng 8 2018

Đáp án : B

Trọng âm của từ này rơi vào âm tiết thứ 3, các từ còn lại rơi vào âm tiết thứ 2.

30 tháng 6 2018

Đáp án C

A. reserved (adj): kín kẽ, rụt rè.

B. funny (adj): hài hước.

C. sociable (adj): cởi mở, hoàn đồng, chan hòa.

D. social (adj): thuộc về xã hội- tính từ này không dùng để nói về tính cách con người.

Dịch: Bạn càng cởi mở thì bạn càng dễ kết bạn.

8 tháng 9 2018

Đáp án D

however: tuy nhiên (khi đứng giữa câu, phải được ngăn cách bởi 2 dấu phảy)

therefore: do đó, vì vậy (khi đứng giữa câu, phải được ngăn cách bởi 2 dấu phảy)

so: nên, do đó

but: nhưng

=> đáp án D

Tạm dịch: Jane nấu ăn ngon nhưng cô ấy ghét rửa bát sau đó.