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问题 单项选择题

《中华人民共和国可再生能源法修正案》颁布实施的时间是（）。

A.2010年12月24日

B.2010年4月1日

C.2009年4月1日

D.2009年12月24日

答案

参考答案：B

单项选择题

Personal computers are used by one person at a time. The largest personal computer, or PCS, can fit on a (1) . Some of these (2) have more than one microprocessor. (3) the primary processor, which is a general-purpose device, a PC may have one or more processors to (4) special kinds of work. Some machines, (5) , have maths processors, others have graphics processors to help process photographs and other illustrations. Still others have (6) processors.
Office workers also use PCS that are not (7) to a network. These machines are used for (8) tasks as word processing, performing financial calculations, and organizing and (9) bodies of information called databases. People use PCS at (10) for some of the same kinds of tasks. They use word processing programs for (11) Communication, financial software for household budgets. Individuals also use their home computers to play (12) and to communicate (13) the internet.
Small, portable PCS are (14) with people who often work away from their desks. The (15) include laptop computers, which can be (16) on the lap; notebook computers, which are about the (17) of a loose leaf notebook; and palmtop, or handheld computers, which can be operated while (18) in the hand. Laptop and notebook computers have the same (19) as desktop computers. Palmtop computers have less power but still (20) some advanced capabilities. For example, they can process household financial data.

二、完形填空

A．weight

B．size

C．length

D．width
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单项选择题

低压电工作业是指对（）V以下的电气设备进行安装、调试、运行操作等的作业。

A、500

B、250

C、1000
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