Câu hỏi:

15/04/2020 496

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 following questions.
In the history of technology, computers and calculators were innovative developments. They are essentially different from all other machines because they have a memory. This memory stores instructions and information. In a calculator, the instructions are the various functions of arithmetic, which are permanently remembered by the machine and cannot be altered or added to. The information consists of the numbers which are keyed in.
An electronic pocket calculator can perform almost instant arithmetic. A calculator requires an input unit to feed in numbers, a processing unit to make the calculation, a memory unit, and an output unit to display the result. The calculator is powered by a small battery or by a panel of solar cells. Inside is a microchip that contains the memory and processing units and also controls the input unit, which is the keyboard, and the output unit, which is the display.
The input unit has keys for numbers and operations. Beneath the key is a printed circuit board containing a set of contacts for each key. Pressing a key closes the contacts and sends a signal along a pair of lines in the circuit board to the processing unit, in which the binary code for that key is stored in the memory. The processing unit also sends the code to the display. Each key is connected by a different pair of lines to the processing unit, which repeatedly checks the lines to find out when a pair is linked by a key.
The memory unit stores the arithmetic instructions for the processing unit and holds the temporary results that occur during calculation. Storage cells in the memory unit hold the binary codes for the keys that have been pressed. The number codes, together with the operation code for the plus key, are held in temporary cells until the processing unit requires them.
When the equals key is pressed, it sends a signal to the processing unit. This takes the operation code - for example, addition - and the two numbers being held in the memory unit and performs the operation on the two numbers. After the addition is done, the result goes to the decoder in the calculator's microchip. This code is then sent to the liquid crystal display unit, which shows the result, or output, of the calculation.
What is the main purpose of the passage?

A. To summarize the history of technology

B. To explain how a calculator works

C. To discuss innovative developments in technology

D. To compare computers and calculators with other machines

Xem lời giải

Câu hỏi trong đề: Đề luyện thi THPT Quốc Gia - Năm 2020 Môn thi: TIẾNG ANH !!

Bắt đầu thi

Trả lời:

Giải bởi Vietjack

Kiến thức: Đọc hiểu

Giải thích:

Mục đích chính của đoạn văn là gì?

A. Tóm tắt lịch sử công nghệ

B. Để giải thích cách hoạt động của máy tính

C. Để thảo luận về sự phát triển đột phá trong công nghệ

D. So sánh máy tính bỏ túi và máy tính với các loại máy móc khác

Xuyên suốt đoạn văn, tác giả liệt kê về các bộ phận của máy tính bỏ túi cũng như giải thích về chức năng của chúng. => Mục đích chính của đoạn văn là giải thích cách hoạt động của máy tính.

Chọn B

Bình luận

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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.
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People should _______ green lifestyle to help conserve the natural resources.

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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.
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D. The children attracted by the show which was performed by the animals.

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Would you mind _______ these plates a wipe before putting them in the cupboard?

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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.
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Câu 7:

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Bình luận

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.
Right after the boy got out of his house, it started to rain heavily.

People should _______ green lifestyle to help conserve the natural resources.

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 children were attracted by the show. It was performed by the animals.

Would you mind _______ these plates a wipe before putting them in the cupboard?

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.
Educators are complaining that students rely on social media so much that they lose the ability to think critically.

We are all too _______ of traditions in our modern world, but they can have a very strong impact on us.

Digital clocks, however precise, they cannot be perfectly accurate because the earth’s rotation changes slightly over years.

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Bình luận

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.Right after the boy got out of his house, it started to rain heavily.

People should _______ green lifestyle to help conserve the natural resources.

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 children were attracted by the show. It was performed by the animals.

Would you mind _______ these plates a wipe before putting them in the cupboard?

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.Educators are complaining that students rely on social media so much that they lose the ability to think critically.

We are all too _______ of traditions in our modern world, but they can have a very strong impact on us.

Digital clocks, however precise, they cannot be perfectly accurate because the earth’s rotation changes slightly over years.

VIP +1 tháng ( 199,000 VNĐ )

VIP +3 tháng ( 299,000 VNĐ )

VIP +6 tháng ( 399,000 VNĐ )

VIP +12 tháng ( 499,000 VNĐ )

🔥 Đề thi HOT:

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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.
Right after the boy got out of his house, it started to rain heavily.

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 children were attracted by the show. It was performed by the animals.

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.
Educators are complaining that students rely on social media so much that they lose the ability to think critically.