问题 问答题

哪些安装和检修方面的原因,会引起轴瓦瓦温升高或烧瓦?

答案

参考答案:

一般属于安装检修方面的原因有以下11项:①轴瓦间隙过小;②机组摆度过大;③机组中心不正;④油质不好或油的牌号不对;⑤轴瓦修刮不良;⑥镜板粗糙度不够,卧式机组推力盘热套不正或热套紧力不够;⑦轴承绝缘不良;⑧冷却器失效;⑨抗重螺栓、定位销、固定螺栓未打紧;⑩就某些结构的推力轴承而言,各瓦受力不均;油槽油量不足。

阅读理解

阅读理解。

    In June,2007,a group of students from eight highI'm daydaytest Placeholder!

schools in Winnipeg, the capital of Canada's ManitobaProvince, will begin test-launching

(试发射) a satellite the size of a Rubik's cube.

The one-kilogram WinCube satellite,

named for its home city and its shape, will be put into low orbit. Once in space,it can

perform for a few months or up to several years, communicating information  that could

help find the early signs of earthquakes.

    

     There are 80 similar satellite projects worldwide, but this is the first high school based

program of its kind in Canada, 30 Manitoba high school students are having a hand

in designing and building the satellite, in cooperation with aerospace (航空航天的 )

experts and 10 students from the University of Manitoba, and with support from two other

organizations.

    The Win-Cube project is not something that goes on a piece of paper; it is real-world

engineering, allowing high school students to have an opportunity to learn more about the

exciting world of engineering through their participation in this challeng-ing program It is

also taken as a wonderful example of the unique partnerships within Manitoba. Designing,

building and launching a satellite with high-school participation will bring this world-class

educational project into reality and Manitoba closer

to space.

    "These Manitoba high school students deserve congratulations for their enthusiasm,

innovation (创新) ,and a  strong love for discovery,"said Education,Citizenship andYouth

Minister Peter Bjornson. "We want to make science more relevant c相关的) ,interesting

and attractive to high school students by showing them how classroom studies can relate

to practical experience in the workplace or, in this case,in space,"Bjornson added.

      The Win-Cube program is mainly aimed at inspiring a strong desire for discovery on

the part of the students. It also shows Manitoba's devotion to research and innovation and

the development of a skilled workforce-all important drivers of knowledge-based economic

growth.   

1. According to the passage, the Win-Cube satellite is_______.    

A. named after Manitoba and its shape

B. intended for international communication

C. designed like a Rubik's cube both in shape and size

D. challenged by university students around the world

2. According to Mr. Bjornson,_______ .   

A .those Manitoba high school students are worth praising

B. the study of space c an be practically made in classrooms

C. Manitoba high schools are famous for the study of space

D. scientific research is too far away from high school students

3. The primary purpose of the project is to_______. 

A. find the early signs of earthquakes

B. relate studies to practical experience

C. help high school students study real-world engineering

D. inspire a strong desire for discovery among the students

4. The best title for this passage may be_______.

A. Manitoba School

B. Win-Cube Program

C. Space Cooperation

D. Satellite Launching

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