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Câu hỏi:

29/06/2024 332

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 31 to 35

      Nanotechnology is the creation and use of materials or devices at extremely small scales. These materials or devices fall in the range of 1 to 100 nanometers (nm). One nm is equal to one-billionth of a meter (.000000001 m), which is about 50,000 times smaller than the diameter of a human hair. Scientists refer to the dimensional range of 1 to 100 nm as the nanoscale, and materials at this scale are called nanocrystals or nanomaterials.

    The nanoscale is unique because nothing solid can be made any smaller. It is also unique because many of the mechanisms of the biological and physical world operate on length scales from 0.1 to 100 nm. At these dimensions materials exhibit different physical properties; thus scientists expect that many novel effects at the nanoscale will be discovered and used for breakthrough technologies.

    A number of important breakthroughs have already occurred in nanotechnology. These developments are found in products used throughout the world. Some examples are catalytic converters in automobiles that help remove air pollutants, devices in computers that read from and write to the hard disk, certain sunscreens and cosmetics that transparently block harmful radiation from the Sun, and special coatings for sports clothes and gear that help improve the gear and possibly enhance the athlete’s performance. Still, many scientists, engineers, and technologists believe they have only scratched the surface of nanotechnology’s potential.

    Nanotechnology is in its infancy, and no one can predict with accuracy what will result from the full flowering of the field over the next several decades. Many scientists believe it can be said with confidence, however, that nanotechnology will have a major impact on medicine and health care; energy production and conservation; environmental cleanup and protection; electronics, computers, and sensors; and world security and defense.

(Adapted from: Encarta DVD 2009)

What is the passage mainly about?

A. A new physical property of matters in nature

B. A way of manufacturing technological products

C. An introduction to a new technology

Đáp án chính xác

D. An overview of how technology will develop

Trả lời:

verified Giải bởi Vietjack

Đáp án C

Tạm dịch: Đoạn văn chủ yếu nói về điều gì?

A. Một tính chất vật lý mới của các chất trong tự nhiên.

B. Một cách để sản xuất ra các sản phẩm công nghệ.

C. Sự giới thiệu về một công nghệ mới.

D. Tổng quan về cách mà công nghệ sẽ phát triển.

Dựa vào câu đầu tiên của đoạn văn: Công nghệ nano là sự tạo ra và sử dụng các vật liệu hoặc các thiết bị ở kích thước đặc biệt nhỏ. Và những câu văn giới thiệu về công nghệ này như: kích thước cụ thể của vật liệu nano (dòng 2 – đoạn 1: in the range of 1 to 100 nanometers), công nghệ này đang trong giai đoạn sơ khai (dòng đầu – đoạn cuối: in its infancy)

Câu trả lời này có hữu ích không?

0

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Câu 4:

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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

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Câu 9:

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

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Mark the letter A, 8, C, or D on your answer sheet to indicate the sentence that best completes each of the following exchanges

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Staff: “________”

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Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions

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Câu 12:

Mark the letter A, 8, C, or D on your answer sheet to indicate the sentence that best completes each of the following exchanges

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Câu 13:

Read the following passage and mark the letter A, B, C or D on your answer sheet indicate the correct word or phrase that best fits each of the numbered Weeks from 26 to 30

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From its very beginning, the fourth Industrial revolution has never (28) ________ manufacturers with an either - or choice - robots or humans. It has always been about combining the talents of both. Ultimately, it is the convergence of artificial and human intelligence (29) _____ will enable manufacturers to achieve a new era of speed, flexibility, efficiency and connectivity in the 21st century. Machines have the ability to assemble things faster than any human ever could, but humans possess the domain expertise and (30) ______ knowledge required to solve problems and optimize factory floor production.

(Adapted from: http://time.com/4940374/joe-kaeser-siemens-robots-jobs/)

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