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
51
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.
【S6】
选项
答案
alternations—alternatives
解析
形近词误用。alternation表示“交替,轮流,间隔”,alternative表示“可供选择的事物”,此处说“找不到可以替代火箭的东西”,因此用alternatives。
转载请注明原文地址:https://kaotiyun.com/show/VtBK777K
0
专业英语八级
相关试题推荐
(1)Assomewhohaslivedwithoutacarforthepastthreeyears,Iamnofanoffreewaysorexpressways.Butforgivemeamoment
PASSAGETWOWhywillrecentjobopportunitiesbesmall?
PASSAGEONEAccordingtotheauthor,whatismodernaboutTwain?
(1)Youdonotneedtoplayinabandtobepartoftheburgeoning"gigeconomy".Nearlyeveryonehasskillsorassetstheycan
A、Becausehewantstosettledownbipartisandifferences.B、Becausehewantstofixthisissuetobuildareputation.C、Because
PeoplewhogrewupinAmericaandWesternEuropehavebecomeusedtotheideathattheWestdominatestheworldeconomy.Inf
Althoughitisanylongerthebigbusinessthatitwasintheforties,radiocontinuestobeamediumofessentialcommunication
MERS—MiddleEastRespiratorySyndrome—wasfirstreportedontheArabianPeninsulain2012.Sincethen,therehavebeen1,
NowChinahasabout20girls’middleschools,mostofwhichareownedbygovernment.Theonlyprivateonewasestablishedrecent
A、Tocalmthevoters.B、Tospeeduptheprocess.C、Tosticktotheelectionrules.D、Tostopcomplaintsfromtheloser.D推理题。根据采
随机试题
钢管螺纹连接时,使管道直长度增加的管件有()。
舞幽壑之潜蛟,泣孤舟之嫠妇。泣:
A.减轻心脏前负荷B.减轻心脏后负荷C.同时减轻心脏前后负荷D.增加心脏前负荷E.增加心脏后负荷应用肾上腺素
病人有房颤,判断是否为甲亢所致,以下哪项检查不宜选用
A.格列本脲B.普通胰岛素C.阿卡波糖D.二甲双胍E.罗格列酮可用于治疗1型糖尿病的药物是
关于流行病学,下列哪种说法是正确的
锅炉钢架组件吊装应做的:亡作有()。
对于一些技术含量较高、市场较为狭窄、销售周期较长的产品来说,最合适的薪酬制度是()。
张某的一种产品和一项方法专利被授予专利权,下列哪些情形行为人不承担赔偿责任?()
【B1】【B3】
最新回复
(
0
)