问题 问答题 简答题

CVC轧机的基本原理是什么?

答案

参考答案:CVC轧机的基本原理是将工作辊辊身沿轴线方向一半磨削成凸辊形,另一半磨削成凹辊形,整个辊身呈S形或花瓶式轧辊,并将上、下工作辊对称布置,通过轴向对称分别移动上、下工作辊,以改变所组成的孔型,从而控制带钢的横断面形状而达到所要求的板形。

单项选择题 B1型题
阅读理解

阅读理解。

     There are more than one billion people around the world who smoke. Bill Gates, cofounder

and former CEO of Microsoft, wants them all to quit. So does New York City's mayor Michael

Bloomberg. This week, the Gates Foundation, a charity organization set up by Bill Gates and his

wife, Melinda, teamed up with Bloomberg to donate $500 million over the next five years to

antitobacco programs.

     Bloomberg is no stranger to antitobacco plans. He has been fighting tobaccouse in New York

City for years. In 2002, Bloomberg pushed for a ban on smoking in all New York City restaurants.

     Bloomberg's Initiative to Reduce Tobacco Use was created in 2005.  It aims to discourage

smoking trends around the world by working to change tobacco's image, protect nonsmokers from

secondhand smoke, and help people quit. Bloomberg gave $ 125 million to start the program. Now,

he is adding another $ 250 million. The Gates Foundation will invest $ 125 million over five years to

fight the tobacco epidemic, including a $ 24 million gift directly to the Bloomberg Initiative.

     The money donated by the Gates Foundation will support antismoking efforts in developing

countries where tobacco use is the highest. "Tobaccocaused diseases have become one of the

greatest health challenges facing developing countries," Gates says. In addition to donating to the

Bloomberg Initiative, the Gates Foundation will also help prevent the tobacco epidemic from taking

root in Africa. "The epidemic in Africa is not well advanced," Gates explains. "That means that we

can catch it at an early stage."

     Tobaccouse kills more than five million people every year. If the trend doesn't change, more than

one billion people could die of tobaccorelated illnesses this century. Gates and Bloomberg have high

hopes to change these statistics. "Together we can make a clear, measurable difference, not just for

ourselves and our generation, but for the generations that come after us," says Bloomberg.

1. The passage is mainly about ________. 

A. the harmful effects of smoking

B. Bill Gates' contribution to the world

C. a ban on smoking in New York City

D. a plan to stop smoking

2. How much does Bloomberg invest altogether? 

A.  $ 125 million.  

B.  $ 250 million.

C.  $ 375 million.  

D.  $ 500 million.

3. We learn from the passage that ________. 

A. the Gates Foundation is set up by Bill Gates and Bloomberg

B. tobaccouse has become a big threat to developing countries

C. Bloomberg's Initiative to Reduce Tobacco Use was created in 2002

D. tobaccouse kills more than fifty million people every year

4. What's Gates and Bloomberg's attitude towards the antismoking efforts? 

A. Optimistic.                  

B. Skeptical.

C. Opposable.                  

D. Surprised.