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  3. Data processing is a series of operations carried out on data to get informa

Data processing is a series of operations carried out on data to get informa

游客2025-03-10  32
问题     Data processing is a series of operations carried out on data to get information.【C1】______series of operations is also called the data processing cycle. Data are a group of facts called the input(输入). The data may be numbers, letters, or symbols【C2】______may or may not be related. The information is the end, result or the output. Information is data that have been processed. It is【C3】______a brief, usable form. The operations are performed with different tools. A computer is【C4】______kind of data processing tool. The brain is also a data processing tool.
    The brain is like a small, personal computer that controls all bodily and mental【C5】______Data, or input, enter the brain through the senses(sight, smell, touch, taste and hearing). The data are【C6】______by the brain, and the result is information. The information or output may cause physical and mental reactions such as body movements, decisions, or ideas.
    How does the brain tell an apple【C7】______an orange? If the brain could not process data, this would not be possible. Apples and oranges differ in looks, feel, smell, and taste. The brain can tell these differences. The【C8】______in input help the brain to decide which is the apple and which is the orange. There are three levels of processing data.【C9】______level uses different tools. Some levels require less human effort than others. The three levels are manual data processing, electromechanical data processing and electronic data processing. In manual data processing, the brain, hands, and simple tools such as pencils and paper【C10】______Electromechanical data processing uses electrically operated machines. Examples of the types of machines which are used are desk calculators and typewriters. Electronic data processing uses electronic computers that process data at a very high speed. [br] 【C10】
选项 A、use
B、have used
C、used
D、are used
答案 D
解析 在手工数据处理过程中，人们使用大脑、手及诸如纸和笔那样简单的工具。故应选D。表示被动。
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