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Câu hỏi:

19/06/2021 134

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 from 36 to 42.

People have been donating blood since the early twentieth century to help accident victims and patients undergoing surgical procedures. Usually a pint of whole blood is donated, and it is then divided into platelets, white blood cells, and red blood cells. People can donate blood (for red blood cells] about once every two months. Transfusing the blood from the donor to the recipient is straightforward. It involves taking the blood from a donor's arm vein by means of a hypodermic syringe. The blood flows through a plastic tube to a collection bag or bottle that contains sodium citrate, which prevents the blood from clotting. When the blood is given to a patient, a plastic tube and hypodermic needle are connected to the recipient's arm. The blood flows down from the container by gravity. This is a slow process and may last as long as 2 hours to complete the infusion of blood into the recipient. The patient is protected from being infected during the transfusion. Only sterile containers, tubing, and needles are used, and this helps ensure that transfused or stored blood is not exposed to disease causing bacteria. Negative reactions to transfusions are not unusual. The recipient may suffer an allergic reaction or be sensitive to donor leukocytes. Some may suffer from an undetected red cell incompatibility. Unexplained reactions are also fairly common, Although they are rare, other causes of such negative reactions include contaminated blood, air bubbles in the blood, overloading of the circulatory system through administration of excess blood, or sensitivity to donor plasma or platelets. Today, hospitals and blood banks go to great lengths to screen all blood donors and their blood. All donated blood is routinely and rigorously tested for diseases, such as HIV, hepatitis B, and syphilis. When the recipient is a newborn or an infant, the blood is usually irradiated to eliminate harmful elements. Donated blood is washed, and the white blood cells and platelets removed. Storing the blood sometimes requires a freezing process. To freeze the red blood cells, a glycerol solution is added. To unfreeze, the glycerolis removed. The ability to store blood for long periods has been a boon to human health.

The word "it" refers to_________.

A. surgical procedures

B. accident victims

C. a pint of whole blood

Đáp án chính xác

D. surgery patients

Trả lời:

verified Giải bởi Vietjack

ĐÁP ÁN C

CHỦ ĐỀ VOLUNTEER WORK

Từ “it” dùng để chỉ_________.

A. thủ tục phẫu thuật                         B. người bị tai nạn

C. một lượng máu                             D. bệnh nhân phẫu thuật

Thông tin: Usually a pint of whole blood is donated, and it is then divided into platelets, white blood cells, and red blood cells. (Thông thường, một lượng máu được hiến tặng, sau đó chia thành tiểu cầu, bạch cầu và hồng cầu.)

=> "it" chỉ "a pint of whole blood" 

Câu trả lời này có hữu ích không?

0

CÂU HỎI HOT CÙNG CHỦ ĐỀ

Câu 1:

Some high school students often_____helping the disadvantaged or handicapped children.

Xem đáp án » 19/06/2021 1,439

Câu 2:

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.

Many people enjoy lying in bed in the morning, but can you imagine having to spend 90 days in bed? Could you stand the boredom and the frustration of not being(31)_____ to get up? That was the task that faced 14 volunteers when they started out on a bed-rest experiment being conducted (32)_____ the European Space Agency.

The study had a serious purpose: to investigate the changes that take place in the human body during long-duration spaceflight. Lying in a horizontal position was the best way of (33)_____ weightlessness. The aim was to discover what effect period of weightlessness will
have on the health of astronauts spending several months on the International Space Station.

The volunteers ate their meals, took showers and underwent medical tests without ever sitting up. That's even tougher than it sounds, especially when you (34)_____ that no visitors were permitted. However, each volunteer did have a mobile phone, as well as access to the latest films,

computer games and music. Surprisingly, Everyone was in a good (35)_____ at the end of the
90 days, 'I would do it again,' said one of the volunteers. 'It was disorientating, but we knew we were 'contributing to medical research and space exploration.

Điền vào ô 35.

Xem đáp án » 19/06/2021 1,159

Câu 3:

She frequently volunteers_____extra work because she really likes her job.

Xem đáp án » 19/06/2021 1,139

Câu 4:

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.

I'm sure Luisa was very disappointed when she failed the exam.

Xem đáp án » 19/06/2021 1,111

Câu 5:

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.

Many people enjoy lying in bed in the morning, but can you imagine having to spend 90 days in bed? Could you stand the boredom and the frustration of not being(31)_____ to get up? That was the task that faced 14 volunteers when they started out on a bed-rest experiment being conducted (32)_____ the European Space Agency.

The study had a serious purpose: to investigate the changes that take place in the human body during long-duration spaceflight. Lying in a horizontal position was the best way of (33)_____ weightlessness. The aim was to discover what effect period of weightlessness will
have on the health of astronauts spending several months on the International Space Station.

The volunteers ate their meals, took showers and underwent medical tests without ever sitting up. That's even tougher than it sounds, especially when you (34)_____ that no visitors were permitted. However, each volunteer did have a mobile phone, as well as access to the latest films,

computer games and music. Surprisingly, Everyone was in a good (35)_____ at the end of the
90 days, 'I would do it again,' said one of the volunteers. 'It was disorientating, but we knew we were 'contributing to medical research and space exploration.

Điền vào ô 34.

Xem đáp án » 19/06/2021 942

Câu 6:

Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.

Two friends Diana and Anne are talking with each other about their shopping.

- Diana: "Look at this catalog, Anne. I think I want to get this red blouse."

- Anne: "______”

Xem đáp án » 19/06/2021 894

Câu 7:

The local authority asked for a _____ contribution from the community torepair roads and bridges.

Xem đáp án » 19/06/2021 871

Câu 8:

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.

A bank has promised a donation of $24 million toward the disaster fund.

Xem đáp án » 19/06/2021 868

Câu 9:

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Xem đáp án » 19/06/2021 831

Câu 10:

Alan _____ is an official document stating that you have passed an examination,completed a course, or achieved some necessary qualifications.

Xem đáp án » 19/06/2021 810

Câu 11:

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Xem đáp án » 19/06/2021 670

Câu 12:

Read the following passage and mark the letter A, B, C, or 0 on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

Every summer, when the results of university entrance exam come out, many newspaper stories are published about students who are top-scorers across the country. Most portray students as hard-working, studious, smart and, generally, from low-income families. They are often considered heroes or heroines by their families, communes, villages and communities, And they symbolise the efforts made to lift them, and their relatives, out of poverty. The students are often too poor to attend any extra-classes, which make their achievements more illustrious and more newsworthy. While everyone should applaud the students for their admirable efforts, putting too much emphasis on success generates some difficult questions.

If other students look up to them as models, of course it's great. However, in a way, it contributes to society's attitude that getting into university is the only way to succeed. For those who fail, their lives are over. It should be noted that about 1.3 million high school students take part in the annual university entrance exams and only about 300,000 of them pass. What's about the hundreds of thousands who fail? Should we demand more stories about those who fail the exam but succeed in life or about those who quit university education at some level and do something else unconventional?

"I personally think that it's not about you scoring top in an entrance exam or get even into Harvard. It's about what you do for the rest of your life," said Tran Nguyen Le Van, 29. He is the founder of a website, vexere.com, that passengers can use to book bus tickets online and receive tickets via SMS. His business also arranges online tickets via mobile phones and email. Van dropped out of his MBA at the Thunderbird School of Global Management in Arizona in the United States. His story has caught the attention of many newspapers and he believes more coverage should be given to the youngsters who can be role-models in the start-up community. Getting into university, even with honours, is just the beginning. We applaud them and their efforts and obviously that can give them motivation to do better in life. However, success requires more than just scores," Van said. Van once told a newspaper that his inspiration also came from among the world's most famous drop-outs, such as Mark Zuckerberg of Facebook or Bill Gates who also dropped out of Harvard University.

Alarming statistics about unemployment continues to plague us. As many as 162,000 people with some kind of degree cannot find work, according to Labour Ministry's statistics this month. An emphasis on getting into university does not inspire students who want to try alternative options. At the same time, the Ministry of Education and Training is still pondering on how to reform our exam system, which emphasises theories, but offers little to develop critical thinking or practice. Vu Thi Phuong Anh, former head of the Centre for Education Testing and Quality Assessment at Vietnam National University in Ho Chi Minh City said the media should also monitor student successes after graduation. She agreed there were many success stories about young people, but added that it was imbalanced if students taking unconventional paths were not also encouraged.

Vietnam is, more than ever, in desperate need of those who think outside the box. Time for us to recognise talent, no matter where it comes from or how.

What is NOT stated in the passage about the top-scorers in the entrance exam?

Xem đáp án » 19/06/2021 612

Câu 13:

After feeling off_____for days, Tom finally went to see his doctor.

Xem đáp án » 19/06/2021 609

Câu 14:

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

At first, there was a lot of opposition from the parents of the disabled children. They used to believe that their children couldn't learn anything at all.

Xem đáp án » 19/06/2021 531

Câu 15:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

The student next to me kept chewing gum. That bothered me a lot

Xem đáp án » 19/06/2021 510

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