首页
登录
职称英语
[originaltext] CAPE CANAVERAL, Fla.—The spacecraft Messenger rocketed away Tu
[originaltext] CAPE CANAVERAL, Fla.—The spacecraft Messenger rocketed away Tu
游客
2023-12-18
61
管理
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:http://tihaiku.com/zcyy/3283739.html
相关试题推荐
[originaltext]Atwenty-threedaysearchoperationthatbeginsThursdaywill
[originaltext]Schoolgoverningorganizationsinthreestatesandthenation’
[originaltext]Martin:Hithere,Pat.Howareyou?Pat:Fine,thanks,Martin.I
[originaltext]Martin:Hithere,Pat.Howareyou?Pat:Fine,thanks,Martin.I
[originaltext]VoiceOne:OnehundredmilesofftheCaliforniacoast,anunde
[originaltext]VoiceOne:OnehundredmilesofftheCaliforniacoast,anunde
[originaltext]TheUniversityofMichigancarriesoutasurveyofthedrugha
[originaltext]TheUniversityofMichigancarriesoutasurveyofthedrugha
[originaltext]FranceandtheUShavesignedanaccordtosharesensitiveinf
[originaltext]TheUNagency,theWorldFoodProgramme,saysIraqisfacinga
随机试题
Foramanwhowantstheworldtoslowdown,CarlHonore’smomentofclarity
[originaltext]M:Goodevening,dearaudience.I’mgladtocontinuethetopicab
男性,62岁,吸烟者。反复咳嗽、咳痰30年,呼吸困难1周入院。查体:BP/150
甲企业2018年度发生了以下情形:(1)存货遭遇自然灾害后的净损失80万元;(2
表1中“”处的数字应为:A.7 B.7.5 C.8.5 D.9
某患者年逾50,经断1年后,近3月阴道出血,量少,色鲜红,质黏稠,伴有五心烦热,
下列各种情况中出现肝浊音界消失的是A.气胸 B.急性重型肝炎 C.急性胃肠穿
许多企业和研究院(所)都设有免费咖啡厅,这一设置的主要目的是( )。A.形成非
下列有关股票承销的表述中,正确的有()。A.采用包销方式销售证券的,承销人可将未
有关钙拮抗药对心肌的作用不正确的是A.负性传导作用 B.负性频率作用 C.负
最新回复
(
0
)