乳酸菌

阅读短文，回答问题。

      China will remember the great moment. At 9: 00 a.m. on October 15th, 2003, the country sent up its first

manned spacecraft, ShenzhouⅤ, into space at Jiuquan Satellite Launch Center in Gansu Province.

      Now China has become the third country in the world to send a person into orbit (运行轨道) after the

former Soviet Union (前苏联) and the United States. Yang Liwei, 38, is China's first spaceman.

      Yang sent a message back to the earth, "I'm feeling very good in space, and it looks wonderful here." Yang

then told his wife and son, "I have looked at our beautiful earth and recorded all that I have seen here."

      It was planned that ShenzhouⅤwould circle the earth 14 times in about 20 hours.

      What did the spaceship take with? Flags and seeds (种子): a national flag, a United Nations flag, the Olympic

flag and one kilogram of seeds for experiments.

      Yang, who comes from Liaoning Province, has been an air force pilot since 1987. He was chosen from 14

pilots after many difficult tests. 

1. When did China launch its first manned spacecraft, ShenzhouⅤinto space?

    ___________________________________________________________________________

2. How many countries are there to send a person into orbit?

    ___________________________________________________________________________

3. Who's China's first spaceman?

    ___________________________________________________________________________

4. How many hours did "ShenzhouⅤ" circle the earth?

    ___________________________________________________________________________

5. What did the spaceship take with?

    ___________________________________________________________________________

（）1920年起源于美国加利福尼亚的；1927年开始传入欧洲，（）年正式成为奥运会正式比赛项目。

剖分式轴瓦一般多用（）来研磨。

A.芯轴

B.铜棒

C.与其相配的轴

D.橡胶棒

根据《通信电源设备安装监理暂行规定》，工程保修阶段进行的工程修补、修复要求与（）的监理工作一致。

A.设计阶段

B.施工准备阶段

C.施工阶段

D.招投标阶段

怎样防止乳胶漆、丙烯酸脂涂料开裂、脱皮？