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
2018-05-25
54
问题
A project likely to evolve in the near or intermediate future is
space tourism. Today space tourism has become a pure commercial【S1】______
activity that would not have to rely unpredictable government【S2】______
decisions. It would therefore put space operations on a much more
solid, dependable footing and would enormously expand man’s space
activity. If some people see space tourism as a potential multibillion-【S3】______
dollar business, difficult technical problems remain to be sobered.
First, in order to fulfill the dream of space tourism, a
manned reusable rocket like the Venture Star must be built.
Then, the second serious problem must be addressed; Even【S4】______
today’s most-advanced space rockets are able to lift only about
2. 5% of their launch weight into orbit—a ratio that has hardly
changed in the last 40 years. But it is simply impossible to find【S5】______
other alternations other than a rocket. This unsatisfying fact is a【S6】______
result of the limits of material characteristics and chemical power
sources, and there is no indication which any fundamental【S7】______
breakthrough can be expected in these areas in the foreseeable
future. Then these who have long-cherished dreams of space tourism【S8】______
have to wait forever.
Operational costs may be somewhat reduced by the use of air-
breathing engines to help a reusable rocket penetrate into earth’s
atmosphere. Today the highest cost attainable to lift a payload to【S9】______
orbit 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【S10】______
price for a short trip around the world.
【S6】
选项
答案
alternations一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/jeoK777K
0
专业英语八级
相关试题推荐
SurvivalofEnglishLanguageI.Introduction—Englishwidespreadin【T1】______【T1】______—【T2】______show(s)howEnglishsurvived【
SurvivalofEnglishLanguageI.Introduction—Englishwidespreadin【T1】______【T1】______—【T2】______show(s)howEnglishsurvived【
A、Subjective.B、Supportive.C、Regretful.D、Indifferent.C本题设题点在转折处。根据句(7—1)可知,在夏威夷度假时,加布和他的妻子花了一大笔钱住酒店,紧接着在句(7—2)中加布提到如果现在再去的话,他
HowtoApproachaDissertationI.WhatisadissertationA.Apieceofwritingwithargument:—analyzetheevidencetosupport
A、Toimprovementalhealth.B、Topromoteuniversalhealthcare.C、Toprovidecleanwater.D、Toestablishwholesomesocialrelati
Itwouldhavebeenimpossible,completelyandentirely,foranywomantohavewrittentheplaysofShakespeareintheageofSha
Whomcanyoutrustthesedays?ItisaquestionposedbyDavidHalpernofCambridgeUniversity,andtheresearchersattheDowni
PassageThreeWhatdoestheauthorthinkoftechnology?
Cambridgehastakenthetopspotinthisyear’sGuardianUniversityGuideleaguetable,breakingitsarchrivalOxford’ssix-yea
PassageFourAccordingtoParagraphSix,whatbenefitcanthistechnologybring?
随机试题
完成相互依存的任务,实现共同使命的一群人是指()
案例:故事发生的两个企业:企业A,某知名企业,现已没落,名字隐去。企业B,某知名企业,历久不衰,名字隐去。故事发生的背景:两企业都有一个工作规定,上午工作到12点,公司分发午饭,吃饭后到13点30分上班,期间可以在休息室休息,也可以去体育
“-3/2自疏法则”描述了植物种群内个体间由于竞争而产生的
保险通知书是保险人承保被保险人在一定时期内分批发运的货物所开列的保险单。()
下例资料中,属于建设项目竣工验收的工程技术资料验收内容的是()。
猛安谋克
犯罪的一般客体是对同类客体的抽象和概括。()
TheoutbreakofswinefluthatwasfirstdetectedinMexicowasdeclaredaglobalepidemiconJune11,2009.Itwasthefirstwo
Ascomputersandconnectivitybecomecheaper,itmakessensetobakethechipsintomoreandmorethingsthatarenot,inthemse
CONSULTING
最新回复
(
0
)