2. 外语
  3. Generally, a computer is any device that can perform numerical calculations. Currently,【C1】______, the term usually refers【C2】__

Generally, a computer is any device that can perform numerical calculations. Currently,【C1】______, the term usually refers【C2】__

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问题     Generally, a computer is any device that can perform numerical calculations. Currently,【C1】______, the term usually refers【C2】______an electronic device that can【C3】______a series of tasks according to a set of instructions.
    In 1953 there were only about 100 computers【C4】______use in the world. Today hundreds of millions of computers are【C5】______in homes, schools, businesses, government offices, and universities for almost every conceivable【C6】______.
    Modern desktop【C7】______computers, or PCs, are many times more powerful than the huge, million dollar【C8】______computers of the 1960s and 1970s. Most PCs can perform from 400 million to several billion operations per second. These computers are used not【C9】______for household management and personal entertainment, but also for most of the automate【C10】______require by small business. The fastest desktop computers are called workstations, and they are generally used for scientific, engineering, or advanced business application.
【C5】
选项
答案used
解析 本题空格处讲的是今天数以亿计的计算机正被使用着。此处是被动语态，因此应用动词的过去分词形式，应填used。
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