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
43
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
What’sthepassageabout?______.Whoiseasiertobetaughtasfarastheteacherisconcerned?______.
Allthatwereallyneedtoplotoutthefutureofouruniverseareafewgoodmeasurements.Thisdoesnotmeanthatwecansitd
Iamnotofthosepeoplewholikeastrenuous(费力的)holiday;Ibelievein______.
Scientistsusedtoexplore【31】thesurfaceoftheocean.Nowthey【32】belowthesurface,too.Theywanttoknowabouttheoceanwa
"Igetbywithalittlehelpfrommyfriends"isapopularlyric(抒情诗)withage-oldwisdombehindit.【B1】______peopleneedpeop
"Igetbywithalittlehelpfrommyfriends"isapopularlyric(抒情诗)withage-oldwisdombehindit.【B1】______peopleneedpeop
Intheexperiment,theinfants______.Ifthewritercontinuestodevelopthispassage,hewillprobably______.
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleusemoneytobuyfood,furniture,books,bicyclesand
MarkClements,53,agarageman,hadlonganduntidyhair.LauraShira,43,whogiveshaircuts,neededcarrepairs.Ratherthan【3
Throughouthistorygoldhasbeenimportantinhumansociety.Men【36】forit.Peoplehavesufferedgreathardshipssearching【37】it
随机试题
担任电子商务物流和配送任务的网络是
______itornot,hisdiscoveryhascreatedastirinscientificcircles.
某肝癌患者病情已到晚期,处于极度痛苦之中,自认为是肝硬化,寄希望于治疗,病情进展和疼痛发作时,多次要求医生给予明确说法和治疗措施。此时,医生最佳的伦理选择应该是
在建设工程施工阶段,属于监理工程师投资控制的任务是( )。
美元作为黄金的主要标价货币,假定金价保持在945美元/盎司不变,当欧元和美元的比例为1:1.5869时,欧洲金价是( )欧元/盎司。
某厂开发的新产品——气功激发仪,在某商场柜台摆放了3个月无人问津。忽然有一天该商品被顾客抢购了198个。产品由滞转畅的原因是,推销员不仅向顾客介绍商品的性能,而且现场进行表演,在一位患肩周炎的老人身上具体示范。奇迹发生了,当即这位老人的胳膊不仅能抬起,而且
圆珠笔(签字笔、中性笔)是我们很熟悉的书写工具。在设计制造时,笔芯内的油墨量与金属笔嘴的寿命存在科学的对应关系,且笔芯上端通常都留有一小孔。关于这些设计的说法不正确的是:
2011年全国农民工总量达到25278万人,增长4.4%。从就业地点看,在直辖市务工的占10.3%,在省会城市务工的占20.5%,在地级市务工的占33.9%,在地级以上大中城市务工的农民工比上年提高1.7个百分点。外出农民工月均工资2049元,增长21.2
《香港船头货价纸》
Afour-yearcollegedegree,seenforgenerationsasatickettoabetterlife,is【C1】______enoughtoguaranteeasteadilyrising
最新回复
(
0
)