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问题 单项选择题

在双代号或单代号网络计划中，判别关键工作的条件是该工作( )。

A．与其紧后工作之前的时间间隔为零

B．自由8寸差最小

C．最迟开始时间与最早开始时间的差值最小

D．耗费资源最多

答案

参考答案：C

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．Including

B．Except

C．Besides

D．With
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多项选择题

公民道德主要包括（）三个方面。

A.社会公德

B.社会责任心

C.职业技能

D.职业道德

E.家庭美德
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