液态轴承马达与传统的滚珠轴承马达相比是具有哪些有关（）A.阻力为零 B.噪声及温度降

阅读理解。

       What do you think the future will be like? Here are some answers from some students.

Mary: Everyone will have a computer at home. There will also be many machines in the future. Then people will

         work only two or three days in a week.

Jack: The weather in he future will be very hot. People can't live on the earth. They will have to look for (寻找)

         another planet to live on.

Linda: I think the life in the future will be nice. There will be a lot of flowers and

         trees. And cities will look like parks.

Henry: Every family will have a family doctor, so people will be

          seldom ill (很少生病) They will live to 120 years old.

1. They are talking about _______. [ ]

A. computers

B. the weather in the future

C. family doctors

D. the life in the future

2. What does Mary think the life will be like in the future? [ ]

A. Machines will help people with their work.

B. Everyone will have a new house.

C. People will live a long life.

D. There will be no doctors.

3. The word "planet" means "             " in Chinese. [ ]

A. 飞船

B. 宇宙

C. 星球

D. 岛屿

4. Why does Jack think people will have to look for another planet to live on? [ ]

A. There will be many flowers and trees

B. The earth will be too hot.

C. There will be too many people.

D. There will be too many machines.

5. Who is worrying about (担心) the life in the future? [ ]

A. Mary

B. Jack

C. Linda

D. Henry

一个圆锥的底面半径为3cm，母线长为5cm,则圆锥的侧面积为______。

由二进制编码构成的语言是______。

A．汇编语言

B．高级语言

C．甚高级语言

D．机器语言

安徽花鼓灯的典型步伐有什么？（）

A.前踢步

B.簸箕步

C.后踢步

D.三步一踢

铵盐水碳化速度是由（）控制的。