如图所示，物体A、B随水平圆盘绕轴匀速转动，物体B在水平方向所受的作用力有（ ）

将以下图形序列中的哪两个调换位置之后，可以呈现出一定的规律性？（）

A．

B．

C．

D．

按照生产能力指数法(x=0.8，f=1.1)，如将设计中的化工生产系统的生产能力提高到3倍，投资额将增加( )。

A．118.9%
B．158.3%
C．164.9%
D．291.5%

• A. Is that clear
• B. Can it do some washing
• C. Why do you think it is useful
• D. It appeared several centuries ago, didn’t it
• E. Will robots be the same as people
• F. What is it
• G. Could you please tell me more about robots
  A: Today we are going to talk about a great invention. It looks like a human being. (61)
  B: It’s a robot. (62)
  A: Of course not. The first robot was invented in 1921.
  B: (63)
  A: Sure. They can take the place of humans to do some boring work. They can also do a lot of dangerous work instead of humans.
  B: (64)
  A: No. Robots can do a lot of work instead of people in many ways, but people wouldn’t be replaced by robots. (65)
  B: We get it.

什么是污水的土地处理系统？

在空分的裸冷中依次把精馏塔、主冷等设备冷却到最低温度各保持2小时，然后整个空分设备冷却，直到达到平衡温度，使所有设备管道外表面都结霜，并保持（）小时。

A.1～2

B.2～3

C.2

D.3～4