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
外语
When you look up at the night sky, what do you see? There are other【B1】______bodies out there besides the moon and stars. One of
When you look up at the night sky, what do you see? There are other【B1】______bodies out there besides the moon and stars. One of
admin
2016-03-02
71
问题
When you look up at the night sky, what do you see? There are other【B1】______bodies out there besides the moon and stars. One of the most【B2】______of these is a comet(彗星).
Comets were formed around the same time the Earth was formed. They are【B3】______ice and other frozen liquids and gases.【B4】______these "dirty snowballs" begin to orbit the sun, just as the planets do.
As a comet gets closer to the sun, some gases in it begin to unfreeze. They【B5】______dust particles from the comet to form a huge cloud. As the comet gets even nearer to the sun, a solar wind blows the cloud behind the comet, thus forming its tail. The tail and the【B6】______fuzzy(模糊的)atmosphere around a comet are【B7】______that can help identify this【B8】______in the night sky.
In any given year, about a dozen known comets come close to the sun in their orbits. The average person can’t see them all, of course. Usually there is only one or two a year bright enough to be seen with the【B9】______eye. Comet Hale-Bopp, discovered in 1995, was an unusually bright comet. Its orbit brought it【B10】______close to the Earth, within 122 million miles of it. But Hale-Bopp came a long way on its earthly visit. It won’t be back for another four thousand years or so.
【B4】
选项
答案
Now and then
解析
此处应填入状语成分。now and then意为“偶尔,有时”。
转载请注明原文地址:https://kaotiyun.com/show/72e7777K
0
大学英语四级
相关试题推荐
Asfoodistothebody,soislearningtothemind.Ourbodiesgrowandmusclesdevelopwiththe【C1】______ofadequatenutritious
Asfoodistothebody,soislearningtothemind.Ourbodiesgrowandmusclesdevelopwiththe【C1】______ofadequatenutritious
Asfoodistothebody,soislearningtothemind.Ourbodiesgrowandmusclesdevelopwiththe【C1】______ofadequatenutritious
BeautyandBodyImageintheMediaA)Imagesoffemalebodiesareeverywhere.Women—andtheirbodyparts—selleverythingfromfoo
BeautyandBodyImageintheMediaA)Imagesoffemalebodiesareeverywhere.Women—andtheirbodyparts—selleverythingfromfoo
BeautyandBodyImageintheMediaA)Imagesoffemalebodiesareeverywhere.Women—andtheirbodyparts—selleverythingfromfoo
BeautyandBodyImageintheMediaA)Imagesoffemalebodiesareeverywhere.Women—andtheirbodyparts—selleverythingfromfoo
BeautyandBodyImageintheMediaA)Imagesoffemalebodiesareeverywhere.Women—andtheirbodyparts—selleverythingfromfoo
随机试题
X2012型龙门铣床的工作进给和快速移动的调速系统是晶闸管一直流电动机无级调速传动系统。其调速范围为50:1,静差度小于15%。()
处理器的分配在逻辑上是分两级进行的,它们分别是
IFG是指
一般来说,合同的保证人不能是()。
下列各项中,应计入产品成本的是()。
下列有关图2中蛋白质的叙述,正确的是()。
“编筐编篓,家家都有”,草编曾在日常生活中随处可见。但随着传统手工艺市场逐渐被工业化挤占,加上传统手工艺传承者少、产品难以推广,草编似乎越来越不受人“待见”。然而,在滨州博兴县锦秋街道湾头村,古老的草编搭上互联网的快车后,迅速打开了市场,焕发出勃勃生机。这
我国幅员辽阔,各地各方面的差异很大,为了使教学不脱离实际而补充必要的乡土教材,贯彻的教学原则是()。
阅读下面的文言文,完成下列问题。晚游六桥待月记袁宏道西湖最盛
近几年来,一个新的群体日益受到社会的广泛关注,他们一般在20岁左右,跟随打工的父母在城市长大,受教育程度普遍不高,生存环境较差,既不是传统意义上的农村人,也不是地地道道的城市人,被称为“农民工第二代”。请你谈谈对这一社会现象的认识。
最新回复
(
0
)