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
A. attempt B. charged C. crucial D. delicate E. essentially F. eventually G. expended H. fraction I. individual
admin
2023-01-09
80
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。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尝试过重复使用太空船,故A项attempt“努力,尝试”为答案。
转载请注明原文地址:https://kaotiyun.com/show/vdcD777K
0
专业英语四级
相关试题推荐
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
Nowadays,amateurphotographyhasbecomeatroublingissue.Citizensofrichcountrieshavegotusedtobeingwatchedbyclosed-
Aprettypotplantmightmakeanunemotionalworkspacefeelmorepersonal.Butnewresearchhasrevealedthatofficeplantsdo
Insteadofhidingdatabehindcloseddoors,manyresearchersinindustryandacademiaalikeareembracingsharing.That’sgoodf
Insteadofhidingdatabehindcloseddoors,manyresearchersinindustryandacademiaalikeareembracingsharing.That’sgoodf
Theeconomiccontrolsimplementedduringthesecondworldwarmaketoday’srestrictionsonrestaurantsandfootballstadiumsloo
Successinmanufacturingdependsonphysicalthings:creatingthebestproductusingthebestequipmentwithcomponentsassemble
Growingcooperationamongbranchesoftourismhasprovedvaluabletoallconcerned.Governmentbureaus,tradeandtravelassocia
A、Theadvantagesofamarriageagreement.B、Theexpensesrequiredbyawedding.C、Howtomakebothendsmeetinmarriedlife.D、
随机试题
Inthefallof1985,Iwasabright-eyedgirlheadingofftoHowardUniversity,aimingatalegalcareeranddreamingofsitting
男,47岁,摔倒后右小腿外上疼痛5h,体检,右小腿外上端肿胀,压痛明显,足下垂,足拇趾背伸障碍,足背外侧感觉迟钝,X线示腓骨小头骨折。该骨折最容易出现的并发症是()
A、<0.3ppmB、0.4~0.6ppmC、0.7~1.0ppmD、1.5ppmE、2~4ppm饮水的适宜氟浓度一般应保持在
肝昏迷患者灌肠或导泻时应禁用
地面水的排除方法有()。
非居民纳税人的下列收入中,应在中国按规定计算缴纳个人所得税的有()。(2009年)
下列劳动力需求曲线中,()表示劳动力需求量变动相对于工资率变动富有弹性。
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。
某国的科研机构跟踪研究了出生于20世纪50—70年代的1万多人的精神健康状况,其间测试了他们在13岁至18岁时的语言能力、空间感知能力和归纳能力。结果发现,在此期间语言能力远低于同龄人水平的青少年,成年后患精神分裂症等精神疾病的风险较高。研究人员认为,青少
近十年来,青岛冰箱厂通过不断引进先进设备和技术,使得劳动生产率大为提高,即在单位时间里,较少的工人生产了较多的产品。以下哪项如果为真,一定支持上述结论?Ⅰ.和2009年相比,2019年青岛冰箱厂的年利润增加了一倍,工人增加了10%。
最新回复
(
0
)