计算机专业英语(2)(5)

Unit 2 Computer Hardware

Exercises

I. March each of the following terms to its equivalent(s).

II.Fill in the blanks with the information given in the text.

1. In computing, __________ __________ __________ __________ (ALU) is a digital __________ that performs arithmetic and logical operations.

2. Computer main memory comes in two principal varieties: __________ __________ or RAM and __________ __________ or ROM.

3. Inputs are the signals or data __________ by the computer, and outputs are the signals or data __________ __________ it.

4. In computers, the control unit was historically defined as one __________ part of the 1946 reference model of Von Neumann __________.

5.

Note that the designation of a device as either input or output depends on the __________. III. Mark the following sentences with true or false according to the passage.

1. A computer has four main components: the arithmetic logic unit (ALU), the control unit, the memory, and the input and output devices;and they are interconnected by business. with the outside world.

( ) ( ) ( ) ( ) ( )

2. I/O(Input and Output Devices) is the means by which a computer exchanges information 3. Mouse and keyboards take as output physical movement that the human user inputs and converts it into signals that a computer can understand. from it.

4. RAM is pre-loaded with data and software that never changes, so the CPU can only read 5. Control systems in advanced computers may change the order of some instructions so as to improve performance.

IV. Translate the following passage from English into Chinese.

Flash memory is a non-volatile computer storage chip that can be electrically erased and

reprogrammed. It is primarily used in memory cards, USB flash drives, MP3 players and solid-state

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