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
专升本
Except for the sun, the moon looks the biggest object in the sky. Actually it is one of the smallest, and only looks big because
Except for the sun, the moon looks the biggest object in the sky. Actually it is one of the smallest, and only looks big because
admin
2012-05-24
81
问题
Except for the sun, the moon looks the biggest object in the sky. Actually it is one of the smallest, and only looks big because it is so near to us. Its diameter is only 2 160 miles (3 389 km), or a little more than a quarter of the diameter of the earth.
Once a month, or, more exactly, once every 29.5 days, at the time we call "full moon", its whole disc looks bright. At other times only part of it appears bright, and we always find that this is the part which faces towards the sun, while the part facing away from the sun appears dark. People could make their pictures better if they kept this in mind — only those parts of the moon which are lighted up by the sun are brighter. This shows that the moon gives no light of its own. It only throws back the light of the sun, like a huge mirror hung in the sky.
Yet the dark part of the moon’s surface is not completely black; usually it is just light enough for us to be able to see its shape, so that we speak of seeing "the old moon in the new moon’s arms". The light by which we see the old moon does not come from the sun, but from the earth. We know well how the surface of the sea or of snow, or even of a wet road, may throw back uncomfortably much of the sun’s light on to our faces. In the same way the surface of the whole earth throws back enough of the sun’s light on to the face of the moon for us to be able to see the parts of it which would otherwise be dark.
How often do we see the moon as its brightest?
选项
A、Once every week.
B、Once every year.
C、Once every 29.5 days.
D、Once every 27 days.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/vuGC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
InAmericansociety,one’ssuccessismeasuredby______.Intermsofsuccess,thePuritansvalueworkhighbecause______.
Eitheryourteacheroryou______mistaken.
Iwas15whenIwalkedintoMcCarley’sBookstoreinAshland,Ore.,andbeganscanningtitlesontheshelves.Themanbehindthe
Flowersarealwaysa______(please)sight,especiallyinthecity.
About70millionAmericansaretryingtoloseweight.Thatisalmost1outofevery3peopleintheUnitedStates.Somepeopleg
IthinklifeisgenerallyhealthierinthecountryandIlike______tonature.
Heisthe______(honour)chairmanoftheWriters’Union.
(非英语专业做)Therewasatimewhenparentswhowantedaneducationalpresentfortheirchildrenwouldbuyatypewriter,aglobe
Isufferedfrommental______becauseofstressfrommyjob.
Thethiefwascaughtandallthestolenjewelshavebeentracked______.
随机试题
儿童早期学写汉字时,对汉字字形、结构、正误的注意属于()。。
肝硬化时肝肺综合征的三联征是指
系统性红斑狼疮最易累及的脏器是
全面风险管理包括项目全过程风险管理、对全部风险的管理、全方位的管理、全面的组织措施四个方面的含义。()
下列关于公司债券发行的说法正确的是()。
甲公司为境内注册的公司,以人民币为记账本位币。甲公司拥有乙公司80%的股权。乙公司在美国注册,在美国生产产品并全部在当地销售,生产所需原材料直接在美国采购。2012年年末,甲公司应收乙公司长期款项1000万美元,该长期应收款实质上构成对乙公司净投资的一部
有关研究表明教育对当代国民收入增长的贡献率显著提高。这说明教育具有()。
碎片化时代人们的注意力很难持久,让用户在邮件页面停留更长时间已经成为了营销者不断努力的方向。随着富媒体化的逐步流行,邮件逐步从单一静态向动态转变,个性化邮件的特性也逐步凸显。GIF制作简单,兼容性强,在邮件中可以增加视觉冲击力。因此,在邮件中插入GIF动态
在新民主主义向社会主义过渡时期进行的社会主义改造包括()。
Howdoesfoodaffectmoodandmind?Theanswermaylieinthechemistryofthebrainandnervoussystem.Moleculescalledneurot
最新回复
(
0
)