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 project likely to evolve in the near or intermediate future is space tourism. Today space tourism has become a pure commercial
A project likely to evolve in the near or intermediate future is space tourism. Today space tourism has become a pure commercial
admin
2022-11-03
38
问题
A project likely to evolve in the near or intermediate future is space
tourism. Today space tourism has become a pure commercial activity【S1】________
that would not have to rely unpredictable government decisions. It would【S2】________
therefore put space operations on a much more solid, dependable footing
and would enormously expand man’s space activity. If some people see【S3】________
space tourism as a potential multibillion—dollar business, difficult
technical problems remain to be solved.
First, in order to fulfill the dream of space tourism, a manned
reusable rocket like the Venture Star must be built. Then, the second【S4】________
serious problem must be addressed:Even today’s most—advanced space
rockets are able to lift only about 2. 5%of their launch weight into
0rbit—a ratio that has hardly changed in the last 40 years. But it is【S5】________
simply impossible to find other alternations other than a rocket. This【S6】________
unsatisfying fact is a result of the limits of material characteristics and
chemical power sources, and there is no indication which any【S7】________
fundamental breakthrough call be expected in these areas in the
foreseeable future. Then these who have long-cherished dreams of space【S8】________
tourism have to Wait forever.
Operational costs may be somewhat reduced by the use of air-
breathing engines to help a reusable rocket penetrate into the earth’s
atmosphere. Today the highest cost attainable to lift a payload into orbit【S9】________
is more than$4, 000 per pound;the price of a ticket to space would
have to be at least$50. 000. It is questionable whether a sufficient
number of customers could be tempted to pay SO a high price for a short【S10】________
trip around the world.
【S4】
选项
答案
第二个the—a
解析
冠词误用。the second表特指,意为排序中的“第二个”。a second表泛指,意为“另一个,又一个”。此处句意为“另一个严重的问题也应得到解决”,故a second符合句意。
转载请注明原文地址:https://kaotiyun.com/show/AtBK777K
0
专业英语八级
相关试题推荐
(1)NewYorkandLondonmayruletheroost,butotherfinancialhubsinAmericaandEuropehavemanagedtocarveoutusefulspeci
PASSAGETWOWhydidBuffettandhisfriendstopsellingthe"Stable-BoySelections"tipsheets?
Anarrowingofyourinterestsisimpliedinalmostanytransitionfromastudyenvironmenttomanagerialorprofessionalwor
Whomcanyoutrustthesedays?ItisaquestionposedbyDavidHalpernofCambridgeUniversity,andtheresearchersattheDow
Bystudyinggeometry,studentscanlearnwhattodeveloplogicalargumentsthroughdeductivereasoning.
Managementjargoncanalienatestaffandleavebosseslookinguntrustworthyandweak,accordingtoasurveypublishedonMonday
ComputerCrimeI.IntroductionCurrentsituation:theincreaseinthenumberandtypesofcomputercrimeII.【T1】______
Followingareagraphshowingthewaterconsumptionindifferentregionsin2000andpredictingincreasein2050,andanexcerpt
Threeblindmenwereexploringanelephant.Thefirstofthem,whohappenedtoreachtheleg,describedtheelephantlikesometh
Scientiststhink______helpssometreestoconservewaterinwinter.
随机试题
期货公司申请金融期货结算业务资格,应当向中国证监会提交经具有证券、期货相关业务资格的会计师事务所审计的前2个会计年度财务报告;申请日在下半年的,还应当提供经审计的半年度财务报告。()
铰链四杆机构中的最短杆就是曲柄。()
双眼中较差眼的视力≥0.3时为双眼中较差眼的视力
影响投资项目规模的因素很多,其中决定投资项目实际达到规模的影响因素是()。
城市防洪、防涝工程设施主要由()组成。
装卸线宜设在直线上,坡度不宜()。
在文学作品赏析课上,教师指出文学作品是反映时代特征的一面镜子,例如《红楼梦》就被称为“中国封建社会的百科全书”。下列作品中,同样有“百科全书”称号的是()。
95,88,71,61,50,()
证明:当x≥0时,f(x)=∫0x(t-t2)sin2ntdt的最大值不超过.
【B1】【B15】
最新回复
(
0
)