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
2023-10-25
74
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/3129221.html
相关试题推荐
(1)RogerRosenblatt’sbookBlackFiction,inattemptingtoapplyliteraryrat
_____humanbehaviormaybecausedbyeatingsubstancesthatupsetthedelicate
Maryhopestobe_____fromhospitalnextweek.A、dismissedB、dischargedC、expelled
Withoutmicroscopesandothermodern______,attemptstoteachsciencewerefuti
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
A.benefitsB.differentC.eventuallyD.instrumentsE.movingF.multipl
A.benefitsB.differentC.eventuallyD.instrumentsE.movingF.multipl
随机试题
Wheredoestheconversationmostlikelytakeplace?[br][originaltext]W:Excus
【B1】[br]【B11】A、plottingB、proposingC、countingD、handlingA此处需要一个动词与course(火箭运
干扰素的特征是()。A.促进一种真核翻译起始因子磷酸化后失活 B.促使真核m
下列各项中,单位可用现金进行结算的有()。A.支付职工工资、津贴1000元 B
TCP会话通过3次握手来建立连接。其中第一次握手:源主机发送一个同步标志位SYN
经室内试验测定,一岩块的饱和单轴抗压强度为65MPa,该岩块属于()。A.坚硬
共用题干 某公司是国内软件业的知名企业,其软件一直以来主要依靠专卖店销售。但是
波长为λ的单色平行光垂直入射到薄膜上,已知n12>n3,如图所示。则从薄膜上、下
(2018年真题)如果误将费用确认为资产,其结果必然是()。A.虚增当期利
某施工单位将工程转包,给建设单位造成10万元损失,则该施工单位不可能承担的法律责
最新回复
(
0
)