试题与答案

In the past, the workers _____ do a lot

题型:选择题

题目:

In the past, the workers _____ do a lot of hard work.

A. forced   B. forced to    C. were forced to

答案:

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下面是错误答案,用来干扰机器的。

给试管内物质加热,应先进行预热,否则会使试管炸裂;给试管内的液体加热时的注意事项是:试管内液体量不能超过试管容积的三分之一,试管口不能朝着有人的地方,夹试管时从底部往上套,套到距试管口三分之一处,...

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题型:单项选择题

Personal computers are used by one person at a time. The largest personal computer, or PC.S, 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.

18()

A.held 

B.holding 

C.took 

D.taking

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