Chủ nhật, 24/11/2024
IMG-LOGO

Câu hỏi:

21/07/2024 307

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 38 to 42.

  Glass is a remarkable substance made from the simplest raw materials. It can be colored or colorless, monochrome or polychrome, transparent, translucent, or opaque. It is lightweight impermeable to liquids, readily cleaned and reused, durable yet fragile, and often very beautiful Glass can be decorated in multiple ways and its optical properties are exceptional. In all its myriad forms - as table ware, containers, in architecture and design – glass represents a major achievement in the history of technological developments.

  Since the Bronze Age about 3,000 B.C., glass has been used for making various kinds of objects. It was first made from a mixture of silica, line and an alkali such as soda or potash, and these remained the basic ingredients of glass until the development of lead glass in the seventeenth century. When heated, the mixture becomes soft and malleable and can be formed by various techniques into a vast array of shapes and sizes. The homogeneous mass thus formed by melting then cools to create glass, but in contrast to most materials formed in this way (metals, for instance), glass lacks the crystalline structure normally associated with solids, and instead retains the random molecular structure of a liquid. In effect, as molten glass cools, it progressively stiffens until rigid, but does so without setting up a network of interlocking crystals customarily associated with that process. This is why glass shatters so easily when dealt a blow. Why glass deteriorates over time, especially when exposed to moisture, and why glassware must be slowly reheated and uniformly cooled after manufacture to release internal stresses induced by uneven cooling.

  Another unusual feature of glass is the manner in which its viscosity changes as it turns from a cold substance into a hot, ductile liquid. Unlike metals that flow or “freeze” at specific temperatures glass progressively softens as the temperature rises, going through varying stages of malleability until it flows like a thick syrup. Each stage of malleability allows the glass to be manipulated into various forms, by different techniques, and if suddenly cooled the object retains the shape achieved at that point. Glass is thus amenable to a greater number of heat-forming techniques than most other materials.

According to the passage, how is glass that has cooled and become rigid different from most other rigid substances?

A. It has an interlocking crystal network. 

B. It has an unusually low melting temperature. 

C. It has varying physical properties. 

D. It has a random molecular structure.

Đáp án chính xác

Trả lời:

verified Giải bởi Vietjack

Đáp án D.

Thông tin nằm ở: “in contrast to most materials formed in this way (metals, for instance), glass lacks the crystalline structure normally associated with solids, and instead retains the random molecular structure of a liquid.”

Dịch nghĩa: Theo như bài văn, thuỷ tinh mà nguội đi và cứng lại khác gì so với đa số các chất rắn khác?
A. Nó có cấu trúc khoá liên kết pha lê.
B. Nó có nhiệt độ nóng chảy thấp một cách bất thường.
C. Nó có tính chất vật lý đa dạng.
D. Nó có cấu trúc phân tử ngẫu nhiên.

Câu trả lời này có hữu ích không?

0

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.

We can enjoy live programmes through _________ satellites.

Xem đáp án » 18/06/2021 5,955

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.

Why didn t you give me a call yesterday? We _______ discuss everything together.

Xem đáp án » 18/06/2021 3,250

Câu 3:

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

Mary put on her scarf _________ she _________ not get cold.

Xem đáp án » 18/06/2021 2,598

Câu 4:

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

The success of shared holidays depends on ______ you shared it with.

Xem đáp án » 18/06/2021 2,110

Câu 5:

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

By September next year I _________ here for ten years.

Xem đáp án » 18/06/2021 2,090

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.

The boy insisted on ___________ a break after lunch.

Xem đáp án » 18/06/2021 2,048

Câu 7:

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

“I haven’t seen Jack for three days. Is he ill?”

 ………………His mother told me that he was in hospital.”

Xem đáp án » 18/06/2021 1,893

Câu 8:

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

“Is Mary hungry?” “………………If so, she’ll tell us.”

Xem đáp án » 18/06/2021 1,661

Câu 9:

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

The teacher is simply too lenient with her students and is passing people who ought to fail.

Xem đáp án » 18/06/2021 1,481

Câu 10:

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

During the earthquake, a lot of buildings collapsed, which killed thousands of people.

Xem đáp án » 18/06/2021 1,456

Câu 11:

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

________ who you are, I still love you.

Xem đáp án » 18/06/2021 1,287

Câu 12:

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

He didn’t bat an eyelid when he realized lie failed the exam again.

Xem đáp án » 18/06/2021 802

Câu 13:

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

I wonder who drank all the milk yesterday. It can t have been Susan    ________ she was out all day.

Xem đáp án » 18/06/2021 794

Câu 14:

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

The AIDS _________ continues to spread around the world. Up to 4,000 people are

infected with the HIV virus every single day.

Xem đáp án » 18/06/2021 792

Câu 15:

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.

The children couldn't go swimming because the sea was too rough.

Xem đáp án » 18/06/2021 759

Câu hỏi mới nhất

Xem thêm »
Xem thêm »