如图所示，A、B、C、D为铜塞，插入后，与下面的金属块接通，使得对应的电阻丝被短

管理的社会属性是由（）决定的。

A.生产力的组织

B.管理的一般性

C.管理的科学性

D.生产关系

一辆汽车在恒定的功率牵引下，在平直公路上由静止出发，经4min的时间行驶1.8km，则在4min末汽车的速度（   ）

A．等于7.5m/s

B．大于7.5m/s

C．等于15m/s

D．15m/s

尿毒症引起鼻出血的原因是（）。

A.凝血障碍

B.小血管损伤

C.破坏造血系统

D.内源性凝血酶原减少

E.血小板异常

• 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.

配气机构起什么作用？