首页
登录
职称英语
A. attempt B. charged C. crucial D. delicate E. essentially F. eventually
A. attempt B. charged C. crucial D. delicate E. essentially F. eventually
游客
2024-09-04
23
管理
问题
A. attempt B. charged C. crucial D. delicate E. essentially
F. eventually G. expended H. fraction I. individual J. maintain
K. minority L. negligible M. scrapping N. slashing O. upsurging
Space X launched a cheaper, partially-used rocket into orbit. That’s a stride toward 【C1】______the price tag of sending payload to space. Successfully flying reusable rockets is a 【C2】______step toward the dream of sending people to Mars. Until now, rockets have almost all been single-use. Once the fuel is【C3】______, a rocket stage plummets to Earth, resulting in the destruction of extremely expensive equipment that costs tens of millions of dollars to build.
Its founder has likened that to 【C4】______a 747 jet after one flight, which would make air travel impossibly expensive. He has suggested that rocket launches could 【C5】______be much cheaper since the cost of the rocket propellants are less than 1 percent of the full-price ticket for a launch. So, if a rocket could be simply refueled like a jetliner for another flight, the cost of space travel could drop to a 【C6】______of what it is now. The stresses of spaceflight on reused boosters, however, are much greater than those on jetliners. The economics will depend on how many times a booster can be flown, and how much the 【C7】______expense will be to repair the booster each time.
Reusable spaceships are not a new idea. NASA’s space shuttles were the first real 【C8】______at a reusable spaceship, but the shuttles proved more 【C9】______than hoped, requiring an army of technicians to 【C10】______them between flights. As a result, they ended up being more expensive than expendable rockets. [br] 【C10】
选项
答案
J
解析
分析句子成分可知,空格处为require sb.to do sth.结构,再结合空格后的宾语them可知,空格处应填入一个及物动词的原形。上一段提到,决定太空航行所需花费的关键性因素是每次维修所需要的花费,而下文提到,太空飞行比消耗性火箭昂贵得多,由此可以推断,太空飞行之所以昂贵是因为维修费用高,因此此处是说每次飞行后都需要大批技术人员进行整修,故J项maintain“维护;保养”为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3743789.html
相关试题推荐
(1)RogerRosenblatt’sbookBlackFiction,inattemptingtoapplyliteraryrat
_____humanbehaviormaybecausedbyeatingsubstancesthatupsetthedelicate
TheauthorsoftheUnitedStatesConstitutionattemptedtoestablishaneffectiv
Shehopedherbusinesswouldeventually______intoa$1billionbusinessinJap
MrsHardieeventually______frommakinganycommentalthoughshereallywantedt
Thisgovernmentofficial’s______ingamblinghaseventuallybroughtabouthisr
A.benefitsB.differentC.eventuallyD.instrumentsE.movingF.multipl
A.benefitsB.differentC.eventuallyD.instrumentsE.movingF.multipl
A.benefitsB.differentC.eventuallyD.instrumentsE.movingF.multipl
A.benefitsB.differentC.eventuallyD.instrumentsE.movingF.multipl
随机试题
Planningisaveryimportantactivityinourlives.Itcangivepleasure,eve
[audioFiles]2014m8s/audio_ezfj_388_20144[/audioFiles]TheCharmingCharacterof
[originaltext]M:DidyouseethatTVspecialonNormanRockwelllastnight?W:
患者,男性,28岁。突发吐鲜血约600ml,伴有烦躁不安、面色苍白,手足湿冷。脉
()国家旅游局制定了《加强旅游行业精神文明建设的意见》该意见第一次完整,系统地提
某企业对一名生产主管进绩效考核。首先由该生产主管做个人述职报告;然后由产部经理他
下列哪一种发热属于症状A.壮热 B.寒热往来 C.小儿夏季热 D.微热
负责对所有业务单位及商业银行整体风险状况进行仔细评估的机构是()。A.董事会
甲企业为增值税一般纳税人,2020年9月外购一批材料,取得的增值税专用发票注明价
关于路面基层说法正确的是()。A.水泥土基层可适用于各种交通的基层和底基层
最新回复
(
0
)