Câu hỏi:
04/04/2020 830Mark the letter A, B, C or D on your answer to indicate the correct answer to each of the question from 1 to 10.
The first two decades of this century were dominated by the microbe hunters. These hunters had tracked down one after another of the microbes responsible for the most dreaded scourges of many centuries: tuberculosis, cholera, diphtheria. But there remained some terrible diseases for which no microbe could be incriminated: scurvy, pellagra, rickets, beriberi. Then it was discovered that these diseases were Câused by the lack of vitamins, a trace substance in the diet. The diseases could be prevented or cured by consuming foods that contained the vitamins. And so in the decades of the 1920‟s and 1930‟s, nutrition became a science and the vitamin hunters replaced the microbe hunters.
In the 1940‟s and 1950‟s, biochemists strived to learn why each of the vitamins was essential for health. They discovered that key enzymes in metabolism depend on one or another of the vitamins as coenzymes to perform the chemistry that provides cells with energy for growth and function. Now, these enzyme hunters occupied center stage.
You are aware that the enzymes hunters have been replaced by a new breed of hunters who are tracking genes – the blueprints for each of the enzymes – and are discovering the defective genes that Câuse inherited diseases – diabetes, cystic fibrosis. These gene hunters, or genetic engineers, use recombinant DNA technology to identify and clone genes and introduce them into bacterial cells and plants to create factories for the massive production of hormones and vaccines for medicine and for better crops for agriculture. Biotechnology has become a multibillion-dollar industry.
In view of the inexorable progress in science, we can expect that the gene hunters will be replaced in the spotlight. When and by whom? Which kind of hunter will dominate the scene in the last decade of our century and in the early decades of the next? I wonder whether the hunters who will occupy the spotlight will be neurobiologists who apply the techniques of the enzyme and gene hunters to the functions of the brain. What to call them? The head hunters. I will return to them later.
Which of the following best describes the author‟s tone in the last paragraph of the passage?
Đáp án chính xác
Câu hỏi trong đề:
Tổng hợp Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 !!
Sách mới 2k7: Tổng ôn Toán, Lí, Hóa, Văn, Sử, Địa…. kỳ thi tốt nghiệp THPT Quốc gia 2025, đánh giá năng lực (chỉ từ 110k).
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Trả lời:
Giải bởi Vietjack
Đáp án là D
đoạn cuối cùng lời của tác giả mang tính chất suy đoán.
Nhà sách VIETJACK:
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions from 33 to 51.
John lost the ___________ bicycle he bought last week and his parents were very angry with him because of his carelessness
Xem đáp án »
04/04/2020
37,258
Câu 2:
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions from 33 to 51.
If it ___________ more humid in the desert of the Southwest, the hot temperatures would be unbearable
Xem đáp án »
04/04/2020
14,348
Câu 3:
Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
The purpose of the United Nations, broad speaking, is to maintain peace and security and to encourage respect for human rights
Xem đáp án »
04/04/2020
12,658
Câu 4:
Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Although we are concerned about the problem of energy sources, we must not fail recognizing the need for environmental protection
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04/04/2020
12,228
Câu 5:
Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
The new model costs twice more than last year‟s model
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04/04/2020
11,799
Câu 6:
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions from 33 to 51.
The company has to ___________ ways of reducing costs.
Xem đáp án »
04/04/2020
10,151
Câu 7:
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions from 33 to 51.
It was such a shock to receive a letter like that ___________.
Xem đáp án »
04/04/2020
9,638
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