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
36
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】______ .
【B2】
选项
答案
therefore
解析
转载请注明原文地址:https://kaotiyun.com/show/itKK777K
0
大学英语六级
相关试题推荐
Thatexperiencesinfluencesubsequentbehaviorisevidenceofanobviousbutneverthelessremarkableactivitycalledremembering
Fromthepassage,whichisthemaininfluencefactorinthefuture?Accordingtotheauthor,whichofthefollowingisTRUEabo
Badeatinghabits,increasedfoodavailability,increasinglysedentarylifestyleandreducedphysicalactivityarethefirstfou
Badeatinghabits,increasedfoodavailability,increasinglysedentarylifestyleandreducedphysicalactivityarethefirstfou
Badeatinghabits,increasedfoodavailability,increasinglysedentarylifestyleandreducedphysicalactivityarethefirstfou
Badeatinghabits,increasedfoodavailability,increasinglysedentarylifestyleandreducedphysicalactivityarethefirstfou
Badeatinghabits,increasedfoodavailability,increasinglysedentarylifestyleandreducedphysicalactivityarethefirstfou
Badeatinghabits,increasedfoodavailability,increasinglysedentarylifestyleandreducedphysicalactivityarethefirstfou
随机试题
建设工程项目进度控制在管理观念方面存在的主要问题包括()。
境外基础证券发行人应当确保存托凭证持有人实际享有的()等权益与境外基础证券持有人权益相当。Ⅰ.参与重大决策Ⅱ.资产收益Ⅲ.剩余财产分配Ⅳ.日常经营
某零售企业欲经营某种新产品,现要就进货方案做出决策。如表5—13所示(收益矩阵表)。根据资料回答下列问题。运用折衷准则,且折衷系数α=0.7,则应选择进货()万件。
下列对汉武帝时期的西汉的描述中,正确的是()。
杜威所属的心理学理论流派是()。
下列选项不属于功能复合材料的是()。
体验营销是指企业采用让目标顾客观摩、聆听、尝试、试用等方式,使其亲身体验企业提供的产品或服务,让顾客实际感知产品或服务的品质或性能,从而促使顾客认知、喜好并购买的一种营销方式。根据上述定义,下列采用了体验营销方式的是()。
论述知觉的基本特征及其在教学中的应用。
以下属于中华民族优良道德传统中追求精神境界,把道德理想的实现看做是一种高层次的需要的有
TermsandConditionsofEmploymentThesetermsandconditionsshouldbereadbeforeyousignyourcontract.Salary:Your
最新回复
(
0
)