首页
登录
职称英语
A project likely to evolve in the near or intermediate future is spacetouri
A project likely to evolve in the near or intermediate future is spacetouri
游客
2024-11-02
4
管理
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. [br] 【S1】
选项
答案
pure—purely
解析
词性混用。这里pure修饰形容词commercial,因此应该使用其副词形式purely,表示“纯粹的商业活动”。
转载请注明原文地址:https://tihaiku.com/zcyy/3828634.html
相关试题推荐
Insomeways,Chinaisanunlikelyhotbedfore-commerce.Only38percentof
Insomeways,Chinaisanunlikelyhotbedfore-commerce.Only38percentof
PassaqeTwo(1)Oneoftheobviousproblemswithpredictingthefuture
PassageThree[br]Whatdoestheauthormeanbysaying"Itsfuturecannows
PassageFour[br]WhatseemstobeaneffectofthepilotprojectinSpain?T
PeoplewhohaveInternetaccessathomearemorelikelytobeinarelation
PeoplewhohaveInternetaccessathomearemorelikelytobeinarelation
PeoplewhohaveInternetaccessathomearemorelikelytobeinarelation
PeoplewhohaveInternetaccessathomearemorelikelytobeinarelation
Predictingthefutureisariskybusinessforascientist.Itissafetosay
随机试题
Aestheticthoughtofadistinctivelymodernbentemergedduringthe18thc
WhichofthefollowingstatementsisINCORRECT?[br]Whatisthetoneofthepas
Look!The______upatthelake______justbreathtaking.A、sceneries:areB、scenerie
Freelancephotographycanbeahighly【B1】______careerandcanpotentially
[originaltext]ManyyoungpeopleintheUnitedStatesneverfinishhighscho
A. B.过A点平行BG连线 C.沿AG直线 D.沿AH直线
健康管理的组成部分是()A.健康信息收集,进行健康监测 B.健康危险因
传统文化是现代流行文化的重要灵感源泉。《青花瓷》这首歌广为传唱,“素坯勾勒出青花
关于招标投标行政监督的说法,正确的是()。 A.招标投标活动中的违法行为记
关于辩护律师在刑事诉讼中享有的权利和承担的义务,下列说法中正确的有( )。A.在
最新回复
(
0
)