问题 问答题 简答题

矿用电机车的机械构造与电器设备有哪些?

答案

参考答案:

机械设备包括车架、轮对、轴承和轴箱、弹簧托架、制动系统、撒沙装置、齿轮传动装置及连接缓冲装置等等。电器设备包括牵引电动机、控制器、启动电阻、受电弓、自动开关照明等。

阅读理解
China’s Manned Space Program
The first stage
The second stage
The third stage
Future plans
Time: October 15, 2003
Spaceship:ShenzhouⅤ
Main events: Chinese astronaunt Yang Liwei was sent up into space. He went around the earth 14 times in his one_day flight.
China became the third country to succeed in manned space flight.
Time: October 12, 2005
Spaceship: Shenzhou Ⅵ
Main events: Chinese astronauts Fei Junlong and Nie Haisheng were both sent up into space.On October 17, the two Chinese space heroes safely returned to the earth.
Time: September 25, 2008
Spaceship: Shenzhou VII
Main events: Chinese astronauts Zhai Zhigang, Liu Boming and Jing Haipeng were all sent up into space. China became the third country to succeed in space walk. On Setember 27, the three Chinese space heroes safely returned to the earth.
China will send up
Tiangong I and Shenzhou VII, IX & X between 2010 and 2012
2. China will make a manned moon landing at a proper(适当的) time around 2017.
China plans to set up a
permanent (永久的) space lab, and build its engineering system in 2020.
 
小题1:Before China, how many countries had already sent their spacemen into space?
A. Only one.           B. Two.                 C. Three.         
小题2:Which spaceship has China succeeded in achieving first space walk?
A. Shengzhou V      B. Shengzhou VI      C. Shengzhou VII
小题3:So far, how many spacemen has travelled to space in China?
A. 3              B. 5              C. 6
小题4:Chinese astronauts will possibly walk on the moon around                .
A. 2010              B. 2017                  C. 2020            
名词解释