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
49
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] 【C2】
选项
答案
C
解析
空格前为不定冠词a,空格后为名词step,因此,空格处应填入一个形容词作定语修饰step。空格后提到,将人类送上火星是一个梦想,因此,能够成功地发射可重复使用的火箭是朝着这个梦想迈出的关键一步,故C项crucial“至关重要的,关键性的”为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3743781.html
相关试题推荐
Maryhopestobe_____fromhospitalnextweek.A、dismissedB、dischargedC、expelled
TheauthorsoftheUnitedStatesConstitutionattemptedtoestablishaneffectiv
Shehopedherbusinesswouldeventually______intoa$1billionbusinessinJap
MrsHardieeventually______frommakinganycommentalthoughshereallywantedt
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
In1997hewas______ofmurderandsentencedtolifeimprisonment.A、chargedB、sue
His_____ingamblinghaseventuallybroughtabouthisruin.(2010-75)A、indulgence
随机试题
Therichnessofourlanguagesisconsideredbymanytobethedistinctivean
Forthispart,youareallowed30minutestowriteashortessayonthetopi
影响住宅用水定额的因素,以下哪条错误?( )A.净菜上市,食品洗涤用水略有下降
关于耗热量与加热设备供热量,下列哪几项错误?( )A.半容积式水加热器的设计小
A.19 B.24 C.29 D.36
国别敞口金额对表内敞口而言通常是该笔敞口在资产负债表上的账面余额,即体现在资产负
A.奶类 B.动物肝脏 C.粮谷类 D.蔬菜、水果 E.豆类维生素A的良
2020年国内游客28.8亿人次,比上年下降52.1%。其中,城镇居民游客20.
下列关于全年一次性奖金的说法正确的有()。A.居民个人取得全年一次性奖金,
材料的损耗一般以损耗率表示,材料损耗率可以通过()计算确定。A.估价法 B.
最新回复
(
0
)