首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
自考
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
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
admin
2013-09-17
29
问题
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 check! Energy flows away from the Sun toward the Earth in a stream of electrified particles that move at speeds around a million miles per hour. These particles are called plasma(等离子体), and the stream of plasma 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.
The breaking and reconnecting of the magnetic field lines can cause atomic particles called electrons(电子)trapped in the belts to fall into the Earth’ s atmosphere at the poles. As the electrons fall into 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(氮)glow 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(极光)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, auroras are seen as far south as Florida, even Mexico!
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!
The Northern Lights are very worth seeing during your lifetime.
选项
A、真
B、假
C、Not Given
答案
A
解析
利用题干句中的特征词worth seeing作为线索,在文中进行搜索,发现相关句“Wehope you are able to…see the Northern Lights at least once during your lifetime.”与题干句意思吻合。
转载请注明原文地址:https://kaotiyun.com/show/TdAR777K
本试题收录于:
英语(二)题库公共课分类
0
英语(二)
公共课
相关试题推荐
数据流程图的特点有:___________。
Americansareaveryenergeticandmobilepeople,alwaysontherun,rushingfromoneappointmenttoanother,fromaPTA(Parent-Tea
Onlinelearningisalsocalleddistanceeducation,whichhelpsstudentswhotakeclassesbycomputerovertheInternettolearnc
Onlinelearningisalsocalleddistanceeducation,whichhelpsstudentswhotakeclassesbycomputerovertheInternettolearnc
Amongthecompanywasalawyer,ayoungmanofabouttwenty-five.Onbeingaskedhisopinion,hesaid,“Capitalpunishmentandlife
Allflights______becauseofthestorm,theydecidedtogotoBeijingbytrain.
Teachers______theirstudentstobeusefultosocietyinthefuture.
A.hashadbothhighlightsandhigherlightsB.twooftheworld’sbestviolinsC.hiscollaborativeeffortswithsomeoftoday’
A.hashadbothhighlightsandhigherlightsB.twooftheworld’sbestviolinsC.hiscollaborativeeffortswithsomeoftoday’
随机试题
设计实时操作系统必须首先考虑系统的
简述无形资产的内容。
胫骨平台及腓骨上端骨折,出现足背伸外翻无力,小腿外侧感觉消失。提示哪个神经受损
隧道封闭长度超过()m时,宜设置消防控制室。
在风险预警中,需要进行预警的内容不包括()。
金融危机对中国经济的影响主要在实体经济,根本原因在于国际经济环境的急剧变化,导致我国的出口出现困难,进而引发经济增长速度放缓。为了减少国际经济环境对我国的不利影响,中央及时、果断地提出了灵活审慎的宏观经济政策,将宏观调控的重点转向保持经济平稳较快增长,明确
总经理:我主张小王和小孙两人中至少提拔一人。董事长:我不同意。以下哪项,最为准确地表述了董事长实际上同意的意思?
犯强奸罪可以适用死刑的情节有()。
某公司欲开发一个在线交易网站,在架构设计阶段,公司的架构师识别出3个核心质量属性场景。其中“网站正常运行时,用户发起的交易请求应该在3秒内完成”主要与①质量属性相关,通常可采用②架构策略实现该属性;“在线交易主站宕机后,能够在3秒内自动切换
执行下列一组命令之后,选择“职工”表所在工作区的错误命令是______。CLOSEALLUSE仓库IN0USE职工IN0
最新回复
(
0
)