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. attempt B. charged C. crucial D. delicate E. essentially F. eventually G. expended H. fraction I. individual J. maintain
A. attempt B. charged C. crucial D. delicate E. essentially F. eventually G. expended H. fraction I. individual J. maintain
admin
2020-11-21
76
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.
【C8】
选项
答案
A
解析
空格前是形容词real,空格后是介词短语,且分析句子结构可知,本句缺少表语,因此,空格处应填入一个名词作系动词were的表语。本段第一句提到,太空船的重复使用并非新概念,原因是美国国家航空航天局之前曾经首次尝试重复使用过太空船,故A项attempt“努力,尝试”为答案。
转载请注明原文地址:https://www.kaotiyun.com/show/hACK777K
0
专业英语四级
相关试题推荐
U.S.EarlyChildhoodEducationFiftyyearsago,【T1】______attendedearlyeducationprograms.Today,【T2】______thechildrenof
U.S.EarlyChildhoodEducationFiftyyearsago,【T1】______attendedearlyeducationprograms.Today,【T2】______thechildrenof
PartyTimeAmericansplanparties【T1】______.Asinothercultures,manyAmericansattendpartiesforweddingsand【T2】______.
PubsPubsplayanimportantpartinthesocialstructureoftheUK./Theyareplaceswhereallagesandsocialclassesmix
IndependenceDayTheFourthofJulymarkstheanniversaryofAmerica’sDeclarationofIndependencefromBritain./Duringth
Americans’PersonalityAmericansusuallyconsiderthemselvesafriendlypeople./Theirfriendships,however,tendtobeshor
A.switchingB.criticalC.diminishD.buysE.peeledF.crucialG.alteringH.fryersI.cutJ.adequatelyK.tasteL.
A.switchingB.criticalC.diminishD.buysE.peeledF.crucialG.alteringH.fryersI.cutJ.adequatelyK.tasteL.
A.additionalB.ideallyC.alteredD.personalE.likelyF.excessiveG.virtuallyH.combinedI.exceedJ.errorsK.p
A、Signtheleaseforaverylongperiod.B、Payonemonth’srentdepositinadvance.C、Renttheroomforatleast6months.D、Pay
随机试题
埋弧焊焊成的奥氏体不锈钢接头具有较高的耐蚀性和良好的抗裂性。()
Word2010中可隐藏()
在腰椎后斜位片上,腰椎附件(椎弓及椎骨的突起)的投影似“猎狗”形状,椎弓峡部相当于
哮喘的病机关键是
A.拒绝调剂B.不得调剂C.按照有关规定报告D.请处方医师确认或者重新开具处方E.拒绝调剂,告知处方医师,应当记录,按照有关规定报告药师应当凭医师处方调剂处方药品,对非经医师处方的药品
泥浆性能指标包括()。
施工机械司机工资属于()。
根据各季度商品销售额数据计算的季节指数分别为:一季度125%,二季度70%,三季度100%,四季度105%。受季节因素影响最大的是()。
如果外汇交易员即期卖出日元3450000,买入美元30000,随后,又即期卖出美元20000,买入欧元16500,则两笔即期交易后,该交易员的头寸情况为()。
在最初若干期没有收付款项,后面若干期才有等额收付的年金形式叫做()。
最新回复
(
0
)