首页
登录
职称英语
A project likely to evolve in. the near or intermediate future is space tour
A project likely to evolve in. the near or intermediate future is space tour
游客
2024-06-06
35
管理
问题
A project likely to evolve in. the near or intermediate future is space tourism, a purely【B1】______ activity that would not have to rely on unpredictable government decisions. It would 【B2】______ put space operations on a much more solid, dependable footing and would enormously【B3】______ man’s space activity. While some people see space tourism as a【B4】______ multibillion-dollar business, difficult technical problems remain to be【B5】______
First, a manned reusable rocket like the Venture Star must be built. Then, a second serious problem must be【B6】______ : even today’s most-advanced space rockets are able to【B7】______ only about 2.5% of their launch weight into orbit-- a ratio that has hardly changed in the last 40 years. This fact is a result of the【B8】______ of material characteristics and chemical power sources, and【B9】______ .
Today the price of a ticket to space would have to be at least $ 50 000. It is questionable【B10】______ . However, space tourism may become more attractive once space facilities are built【B11】______ . [br] 【B3】
选项
答案
expand
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3622750.html
相关试题推荐
Fromthepassage,whichisthemaininfluencefactorinthefuture?[br]Theinf
Fromthepassage,whichisthemaininfluencefactorinthefuture?[br]Accordi
TheStockExchange______(对可能出现的政局变化很敏感).issensitivetolikelypoliticalchang
【S1】[br]【S20】A、involveB、evolveC、solveD、dissolveA形近词辨义。根据语义可以判断,将来的研究领域可能会涉
[originaltext]Ateamofscientistsrecentlybeganaprojecttomeasurethe
[originaltext]Ateamofscientistsrecentlybeganaprojecttomeasurethe
[originaltext]Ateamofscientistsrecentlybeganaprojecttomeasurethe
Largeanimalsthatinhabitthedeserthaveevolvedanumberofadaptationsf
Largeanimalsthatinhabitthedeserthaveevolvedanumberofadaptationsf
Largeanimalsthatinhabitthedeserthaveevolvedanumberofadaptationsf
随机试题
Asamatteroffact,theywouldratherleaveforChinathan______inAmerica.[o
Joe’snamewasfinallyerasedfromthenamelistofapplicantsfortheposition
[originaltext]W:DoyouhaveanaddresswhereIcallwritetoyou?M:No,I’ll
[originaltext]M:Itsoundslikeachallengingposition.W:Yes,itis.Howdoy
Populationagingisatriumphofcivilization.Itisthe【C1】______consequenc
若用256K×8bit的存储器芯片,构成地址40000000H到400FFFFF
Thechangeinthatvillagewasmiraculou
右图所示的是哪种典型地貌?() A.风蚀地貌 B.冰川地貌 C.丹
在全国银行间债券市场债券质押式回购交易中,具有结算代理人资格的金融机构主要有()
电信通信企业的成本特点有()。A.只有固定成本而没有变动成本 B.固定成本比重
最新回复
(
0
)