* Read the following passage and mark the letter A, R, C, or D on your answer sheet to indicate the correct answer to each of the questions from 24 to 30.
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 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, the glycerolis removed. The ability to store blood for long periods has been a boon to human health.
According to the passage, how often can people donate blood for red blood cells?

A. Every four months

B. Every three month

C. Every two months

D. Every month

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Trả lời:

Giải bởi Vietjack

ĐÁP ÁN C

Theo như đoạn văn, bao lâu người ta có thể hiến máu cho hồng cầu?

Đáp án C: 2 tháng 1 lần

Các đáp án còn lại:

A. 4 tháng 1 lần B. 3 tháng 1 lần D. hàng tháng

Thông tin trong bài:

People can donate blood (for red blood cells) about once every two months.

Người ta có thể hiến máu (tế bào hồng cầu) khoảng 2 tháng một lần.

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CÂU HỎI HOT CÙNG CHỦ ĐỀ

Câu 1

THANKS A MILLION
Percy Ross was bom in 1916 in Michigan. His parents has come to the USA from Latvia and Russia and the family were poor. But Percy soon showed a talent (31)_____ business and made a (32)_in the fur trade and auction business. Then disaster struck and he lost all his money. But he soon made a fortune again - this time by manufacturing plastic bags. In 1969, he sold his plastic bag company for millions of dollars.
Ross started giving away in 1977: he gave $50,000 to 50 Vietnamese refugees so that they could make a new home in the USA. (33) he held a Christmas party tor 1,050 poor children in the American town of Minneapolis. Ross bought a bike for every one of the 1,050 children at the party.
After these first experiences of giving money away, Ross decided to do it on a (34)basis. He started a newspaper column called “Thanks a Million”, and later a radio show, in order to (35)___his money. It took years, but Ross finally succeeded in giving away his entire fortune.
(Source: Solutions - Intermediate)
Điền vào ô 31

A. for

B. of

C. On

D. with

Lời giải

ĐÁP ÁN A

A talentfor something. tài năng ở lĩnh vực gì.

= to be gifted.

His parents has come to the USA from Latvia and Russia and the family were poor. But Percy soon showeda talent for business ...

Bố mẹ của ông đã đến Mĩ từ Latvia và Nga và gia đình của ông rất nghèo.

Nhưng Percy nhanh chóng thể hiện tài năng của mình trong kinh doanh ...

Câu 2

THANKS A MILLION
Percy Ross was bom in 1916 in Michigan. His parents has come to the USA from Latvia and Russia and the family were poor. But Percy soon showed a talent (31)_____ business and made a (32)_in the fur trade and auction business. Then disaster struck and he lost all his money. But he soon made a fortune again - this time by manufacturing plastic bags. In 1969, he sold his plastic bag company for millions of dollars.
Ross started giving away in 1977: he gave $50,000 to 50 Vietnamese refugees so that they could make a new home in the USA. (33) he held a Christmas party tor 1,050 poor children in the American town of Minneapolis. Ross bought a bike for every one of the 1,050 children at the party.
After these first experiences of giving money away, Ross decided to do it on a (34)basis. He started a newspaper column called “Thanks a Million”, and later a radio show, in order to (35)___his money. It took years, but Ross finally succeeded in giving away his entire fortune.
(Source: Solutions - Intermediate)
Điền vào ô 33

A. But

B. Then

C. Yet

D. Though

Lời giải

ĐÁP ÁN B

Then + mệnh đề: Sau đó;

Các đáp án còn lại:

But + mệnh đề: Nhưng; Yet + mệnh đề: Thế nhưng;

Though + mệnh đề: mặc dù;

Ross started giving away in 1977: he gave $50,000 to 50 Vietnamese refugees so that they could make a new home in the USA. Then he held a Christmas party for 1.050 poor children in the American town of Minneapolis.

Ross bắt đầu ủng hộ tiền từ năm 1977: ông đã quyên góp $50,000 cho 50 người Việt Nam tị nạn dể họ có thể dựng nhà mới ở Mĩ. Sau đó ông cũng tổ chức một bữa tiệc Giáng Sinh cho 1050 trẻ em nghèo người Mĩ ở thành phố Minneapolis.

Câu 3