2015职称英语考试理工类AB级阅读判断(4)

　　The Northern Lights

　　The solar wind constantly streams toward the Earth，but dont 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 Earths magnetic field，the magnetic field first gets squeezed and then the magnetic field lines break and reconnect.4

　　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

　　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!

　　electrifyv.使带电 plasman.等离子体

　　collidev.碰撞 moleculen.分子

　　flickerv.闪烁 Arcticadj.北极的

　　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：

　　他想通过经理的秘书控制公司。

　　3. the stream of plasma：等离子流

　　5. During solar maximum：在太阳风暴达到最高峰的期间

　　练习：

　　A Right B Wrong C Not mentioned

　　A Right B Wrong C Not mentioned

　　A.Right B Wrong C Not mentioned

　　A.Right B Wrong C Not mentioned

　　A Right B Wrong C Not mentioned

　　A Right B Wrong C Not mentioned

　　A.Right B Wrong C Not mentioned

　　1. B 题句的意思是：太阳的重力太弱，等离子逃离太阳，流向地球。这一说法与短文第一段第一、二句表达的内容不符。句子表达的重点不是太阳的重力太弱，而是太阳太热，其活动又太剧烈，造成等离子逃离太阳，流向地球。所以，答案是选项B。

　　3. C 题句说，有些科学家担心包围地球起防护作用的磁场有一天会消失。短文中找不到这一信息，所以答案是C。

　　5. B 题句的说法明显与短文第三段的叙述不符。第四段介绍说，当在太阳风暴达到最高峰的期间，明亮的北极光甚至在位于极南面的佛罗里达州乃至墨西哥都能看到。所以答案是B。

　　7. B 题句说极光通常很接近地面，又长又厚。这一说法有两点与短文第五段的介绍不符。第一点，极光不是接近地面，而是似乎很接近地面，事实上，最靠近地面的极光离地面也有100公里。第二点，极光不厚，only a few hundred meters thick。所以答案是B。