职称英语考前练习 - 范文无忧网

[英语面试须知]英语面试有哪些须知是求职者所不知道的呢？一起来看看。 1. What isimportant to you in a job? 这个工作对你最重要的是什么? Challenge, the feeling of acplishment, and k...+阅读

职称英语考前练习

Rescue Platform

In the aftermath of the terrorist attacks on the World Trade Center, security experts are trying to develop new ways of rescuing people from burning skysrapers. One idea is a platform capable of flying vertically and hovering in the air like a helicopter. The platform would rise up and down alongside a skyscraper and pick up people trapped in high stories.

The idea for the vertical takeoff platform was hatched more than ten years ago by a Russian aerospace engineer, Did Metreveli, who has since moved to Israel. Metreveli's dedsign, called the Eagle, calls for two jet engines that turn four large horizontal propellers. The spinning of the propellers generates the necessary lift, or upward force, to raise the platform. The more power is supplied to the propellers, the higher the platform rises. Moving the platform sideways involves applying differing amounts of power to each propeller.

Helicopters are now used in some cases to get people out of burning buildings. Escape baskets slung from them dangle beside the building for people to climb into. Unfortunately, the baskets cannot reach every floor of a building because the ropes from which they hang bee unstable beyond a certain length.

So far, Metreveli has built a small-scale model of the Eagle to test his idea. In the wake of September 11, he has been able to secure enough funding to start building a larger, 4-meter by 4-meter prototype, which he calls the Eaglet.

1.A rescue platform called the Eagle is capable of moving vertically but not sideways.

A. Right

B.Wrong

C.Not mentioned

2. The four propellers are fitted horizontally to the Eagle.

A. Right

B.Wrong

C.Not mentioned

3. With the help of jet engines, the Eagel can fly at a speed of 100 miles an hour.

A. Right

B.Wrong

C.Not mentioned