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
55
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.
【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://kaotiyun.com/show/ftBK777K
0
专业英语八级
相关试题推荐
(1)Humanmigration:thetermisvague.Whatpeopleusuallythinkofisthepermanentmovementofpeoplefromonehometoanother
(1)Farmersinthedevelopingworldhatepricefluctuations.Itmakesithardtoplanahead.Butmostofthemhavelittlechoice:
PASSAGEONEWhatwasGrandCanyonbeforeitbecameanationalpark?
(1)Thatsmokingcauseslungcanceriswellestablished.Butwhatcausessmoking?Thisisthequestionattheheartofastudypu
Languagepervadessociallife.Itistheprincipalvehicleforthetransmissionofculturalknowledge,andtheprimarymeans
(1)Whenitcametoconcealinghistroubles,TommyWilhelmwasnotlesscapablethanthenextfellow.Soatleasthethought,an
Thefactthattheworld’scitiesaregettingmoreandmorecrowdedisawell-documenteddemographicfact.CitiessuchasTokyo
Afour-yearstudybysociologistsatTheUniversityofManchesterhasfoundthatwomenaremuchlikelythanmento【M1】______mak
Afour-yearstudybysociologistsatTheUniversityofManchesterhasfoundthatwomenaremuchlikelythanmento【M1】______mak
Thefollowingtwoexcerptsareaboutwhethermusiccontaininginappropriatelyricssuchasviolenceandpornographiccontentsho
随机试题
A.初春发芽前B.夏季植体枯萎时C.春末夏初D.秋冬两季E.全年均可黄柏的适宜采收时间是
普通话辅音系统中属于舌尖后、不送气、清、塞擦音的声母(国际音标)是_____。
注册会计师在审计计划阶段应当确定重要性水平。各类交易、账户余额,列报认定层次的重要性水平被称为()
企业只要将商品所有权上的主要风险和报酬转移给购贷方,就可以确认收入。
根据《我国村民委员会组织法》的规定,关于村民委员会的范围调整,下列哪一选项是正确的?()
下列()不属于建筑工程的分部工程。
通货膨胀的深层次原因有()。
以下各项中,()是对税率适用时间正确的表述。
设n阶方阵A,B,C满足关系式ABC=E,其中E是n阶单位阵,则必有()
下列函数中,为最小项之和形式的是(22)
最新回复
(
0
)