搜题请搜索小程序“爱下问搜题”
问题 填空题

Ｗ125减速箱清洗、检查、更换零件后，组装时必须保证螺旋齿轮的齿侧间隙为（）mm出轴的承轴向游隙留在（），游隙量为（）mm。

答案

参考答案：0.21-0.40；下端；0.10-0.20

选择题

化学与社会生活联系密切，下列做法不可取的是（　　）

A．大量使用农药化肥增加农作物产量

B．在酱油中加入铁强化剂预防缺铁性贫血

C．多吃水果蔬菜补充人体需要的维生素

D．把金属制成合金能提高金属的性能
查看答案
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．sorting

B．dividing

C．to arrange

D．to separate
查看答案