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
A、The spacecraft will fly direct to Mercury. B、The spacecraft will fly three times past Mercury. C、The spacecraft was launched a
A、The spacecraft will fly direct to Mercury. B、The spacecraft will fly three times past Mercury. C、The spacecraft was launched a
admin
2010-06-18
37
问题
CAPE CANAVERAL, Fla.—The spacecraft Messenger rocketed away Tuesday on a long quest to reveal the secrets of mysterious, superhot Mercury, the sun’s nearest planet.
"A voyage of mythological proportions," a NASA flight controller announced as soon as Messenger shed its final rocket stage hours before dawn.
The journey will take 6 1/2 years, covering nearly 5 billion miles on a roundabout ramble through the inner solar system. The probe should reach Mercury by March 2011, then spend a year gathering data.
Scientists want to know how the planet turned out the way it did, and whether the perpetually dark craters at the poles hold ice. Anything scientists can learn about how Mercury formed will shed light on the origins of Venus, Earth and Mars, each one very different.
Tuesday’s launch came one day later than planned; Monday’s attempt had to be scrubbed because of bad weather.
It was a busy night for the U. S. space agency with the Mercury send-off coming less than an hour before another NASA unit directed a spacewalk by the astronaut and cosmonaut aboard the international space station.
The Messenger mission is part of NASA’s bargain-focused Discovery program—costing$427 million for the launch and all the scientific analysis years later in a mission devised by John Hopkins University.
选项
A、The spacecraft will fly direct to Mercury.
B、The spacecraft will fly three times past Mercury.
C、The spacecraft was launched a week later than planned.
D、There is no specific task for this journey.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/qWlO777K
0
专业英语八级
相关试题推荐
A、Americaneducatorshavespentagreatdealonclassroomcomputers.B、EuropeanandAsianeducatorswillnotfollowAmericancou
Thewaythingsarelooking,theroyalfamilywillneedtostartbulkbuyingbirthdaycards.WhenKingGeorgeVsentthefirstte
Amajorstudyofthegrocery-buyinghabitsofmillionsofAmericansreleasedlatelastyearfoundthatpeopleusingfoodstamps
Inourlooks-obsessedsociety,manypeoplethinkthatbeingoverweightisanappearanceissue.Butbeingoverweightisactually
Accordingtothepassage,themaindifferencebetweenahomogeneoussocietyandaheterogeneousoneliesinTheauthorwouldmo
AtthebeginningofthepassagethewritersoundscriticalofThefollowingadjectivescanbesuitablyappliedtoCookeEXCEPT
WhichofthefollowingisNOTthefirm’srecruitmentrequirement?Wegettheimpressionfromthepassagethatinjobrecruitmen
Insixteenth-centuryItalyandeighteenth-centuryFrance,waningprosperityandincreasingsocialunrestledtherulingfamilies
Besides"American"characteristics—individualism,self-reliance,informality,punctualityanddirectness,therearealsosome"
TheCulturalRevivalintheByzantineEmpireBetweentheeighthandeleventhcenturiesA.D,theByzantineEmpirestagedana
随机试题
聚氯乙烯硬板广泛用做石油化学工业上各种储槽的()以及建筑物的瓦楞板、门窗结构、墙壁装饰等建筑用材。
在产品按完工产品计算法适用于月末在产品已经接近完工,或者产品加工完成但尚未包装或尚未验收入库的产品。在这种情况下,为了简化核算工作,可以把在产品视为完工产品,按两者的数量比例分配________和各项加工费用。
围绝经期妇女最早的变化是
当发生手足搐搦症时,说明其血钙已低于
甲欠乙1万元,丙为甲的代理人,丙与乙约定,2008年5月1日偿还乙1万元借款。但到了2008年6月1日甲仍未还钱,于是乙向丙表示同意延期履行债务。此行为在法律上将产生( )的法律后果。
按照违反法律类型的不同,我国把违法行为主要分为刑事违法行为、行政违法行为、民事违法行为三大类。按此分类,下列说法不正确的是()。
产业资本在资本循环过程中在不同阶段执行不同的职能,在售卖阶段,产业资本执行的是()
设函数f(x)具有二阶连续导数,且f(x)>0,f’(0)=0,则函数z=f(x)lnf(y)在点(0,0)处取得极小值的一个充分条件是().
HeartdiseasehaslongbeenBritain’sbiggestsinglekiller.Despiteoureffortstowardoffitsriskfactorswithmoreexercise
Nooneknewwhetherthisexpressedacceptanceofhisfateorjoyathisdeliverance.
最新回复
(
0
)