职称英语理工类阅读判断模拟试卷4职称英语考试

文章作者 100test 发表时间 2009:06:15 06:12:54
来源 100Test.Com百考试题网

　　 阅读下面的短文。每篇短文后面都有七句话，请根据短文的内容判断这些话是正确、错误，还是在短文中没有提到。每个试题计1分,共计7分。
　　 The Northern Lights
　　 The Sun is stormy and has its own kind of weather．It is so hot and active that even the Sun’s gravity cannot hold its atmosphere in check1! Energy flows away from the Sun toward the Earth in a stream of electrified particles that move at speeds around a million miles per hour2．These particles are called plasma，and the stream of plasma3 coming from the Sun is called the solar wind．The more active the Sun，the stronger the solar wind．
　　 The solar wind constantly streams toward the Earth，but don’t worry because a protective magnetic field surrounds our planet．The same magnetic field that makes your compass point north also steers the particles from the Sun to the north and south poles．The charged particles become trapped in magnetic belts around the Earth．When a large blast of solar wind crashes into the Earth’s magnetic field，the magnetic field first gets squeezed and then the magnetic field lines break and reconnect．4
　　 The breaking and reconnecting of the magnetic field lines can cause atomic particles called electrons trapped in the belts to fall into the Earth’s atmosphere at the poles．As the electrons fall to the Earth，they collide with gas molecules in the atmosphere，creating flashes of light in the sky．Each atmospheric gas glows a different color．Oxygen and nitrogen glows red and green and nitrogen glows violet-purple．As these various colors glow and dance in the night sky，they create the Northern Lights and the Southern Lights．
　　 Watching auroras is fun and exciting，but normally you can only see them in places far north like Alaska and Canada．The movement of the aurora across the sky is usually slow enough to easily follow with your eyes but they can also pulsate，flicker，or even move like waves．During solar maximum，5 auroras are seen as far south as Florida，even Mexico! 6
　　 Auroras often seem to be very close to the ground，but the lowest aurora is still about 100 kilometers above the ground，a distance much higher than clouds are formed or airplanes can fly．A typical aurora band can be thousands of kilometers long，a few hundred kilometers high，but only a few hundred meters thick．
　　 We hope you are able to travel to far north places like the Arctic Circle and see the Northern Lights at least once during your lifetime．We know you will never forget it!
　　词汇：
　　 electrify/I5lektrIfaI/v．使带电 plasma/5plAzmE/n．等离子体
　　 steer/stiE (r)/v．认驾驶；导向，引向 electron/I5lektrRn/n．电子
　　 collide/kE5laid/v．碰撞 molecule/5mClikju:l/n．分子
　　 aurora/C:5rC:rE/n．极光 pulsate/pQl5seit/v．跳动
　　 flicker/5flikE (r)/v．闪烁 Arctic/5B:ktik/adj．北极的
　　注释：
　　 1． The sun cannot hold its atmosphere in check：太阳无法控制它自己的大气层。hold ．．．in check是“控制，支配”，例如：
　　 He wants tO hold the company in chedk through the manager’s secretary．
　　他想通过经理的秘书控制公司。
　　 2． move at speeds around a million miles per hour：以约100万英里的时速运动。around＝about。
　　 3． the stream of plasma：等离子流
　　 4． the magnetic field first gets squeezed and then the magnetic field lines break and reconnect：首先，磁场受到挤压，接着磁场磁力线断开又闭合。
　　 5． During solar maximum：在太阳风暴达到最高峰的期间
　　 6． auroras are seen as far south as Florida，even Mexico!：位于极南面的佛罗里达州，乃至于墨西哥都能看到极光。far south意为“极南面”。