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, a purely【B1】______ activity that would not have
A project likely to evolve in. the near or intermediate future is space tourism, a purely【B1】______ activity that would not have
admin
2010-06-11
24
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】______ .
【B11】
选项
答案
that offer tourists a longer and more interesting stay in space
解析
转载请注明原文地址:https://kaotiyun.com/show/MtKK777K
0
大学英语六级
相关试题推荐
A、Peopleworkinginalargefactory.B、Peoplewalkingoncrowdedcitystreets.C、Aneverydayactivityinasmalltown.D、Awell-
Fromthepassage,whichisthemaininfluencefactorinthefuture?Theinfluencethatthereductionofyoungpeoplehashadon
Fromthepassage,whichisthemaininfluencefactorinthefuture?Fromthepassage,welearnpeoplewillhavetokeepworking
Onthewhole,ambitiousstudentsaremorelikelyto______(在学业上比没有抱负的学生更成功).
Badeatinghabits,increasedfoodavailability,increasinglysedentarylifestyleandreducedphysicalactivityarethefirstfou
Badeatinghabits,increasedfoodavailability,increasinglysedentarylifestyleandreducedphysicalactivityarethefirstfou
Badeatinghabits,increasedfoodavailability,increasinglysedentarylifestyleandreducedphysicalactivityarethefirstfou
Badeatinghabits,increasedfoodavailability,increasinglysedentarylifestyleandreducedphysicalactivityarethefirstfou
随机试题
患者,男,66岁。因病情需要行加压静脉输液。加压输液期间,护士应
嗜酸、嗜碱粒细胞都可能增加的疾病有
风湿热湿热阻络证的治法为( )风湿热风湿淫心证的治法为( )
老马以个人财产设立一独资企业,后老马病故,其妻和其子女(均已满18岁)都明确表示不愿继承该企业,所以该企业只得解散。该企业解散时,应由()。
《锅炉大气污染物排放标准》按锅炉建成使用年限分为两个阶段,I时段是指()前建成使用的锅炉。
按风险的影响范围分,风险可分为()。
按现行会计制度,下列属于施工企业存货的有( )。
数千年来中华文化提供的生活方式、民俗民风、中华料理、养生医药、建筑样式、传统节日、民族民间艺术、体育、礼仪,尤其是文字书法,是我们民族的瑰宝。即使在西风强劲的环境下,人们也日益认识到了自己传统文化的可贵。这启示我们要()。①传承民族文化,
设区域D为x2+y2≤R2,则=________.
A、她想知道喝什么酒B、她不喜欢喝酒C、今天晚上不能喝酒C
最新回复
(
0
)