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
2017-06-15
49
问题
A project likely to evolve in the near or intermediate future is
space tourism. Today space tourism has become a pure commercial【S1】______
activity that would not have to rely unpredictable government【S2】______
decisions. It would therefore put space operations on a much more
solid, dependable footing and would enormously expand man’s space
activity. If some people see space tourism as a potential multibillion-【S3】______
dollar business, difficult technical problems remain to be sobered.
First, in order to fulfill the dream of space tourism, a
manned reusable rocket like the Venture Star must be built.
Then, the second serious problem must be addressed; Even【S4】______
today’s most-advanced space rockets are able to lift only about
2. 5% of their launch weight into orbit—a ratio that has hardly
changed in the last 40 years. But it is simply impossible to find【S5】______
other alternations other than a rocket. This unsatisfying fact is a【S6】______
result of the limits of material characteristics and chemical power
sources, and there is no indication which any fundamental【S7】______
breakthrough can be expected in these areas in the foreseeable
future. Then these who have long-cherished dreams of space tourism【S8】______
have to wait forever.
Operational costs may be somewhat reduced by the use of air-
breathing engines to help a reusable rocket penetrate into earth’s
atmosphere. Today the highest cost attainable to lift a payload to【S9】______
orbit 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【S10】______
price for a short trip around the world.
【S9】
选项
答案
highest—lowest
解析
语义错误。从本段的at least,high price等可推知,此处是说太空旅行价格昂贵,故应把highest改为lowest,表示“最低花费”。
转载请注明原文地址:https://kaotiyun.com/show/dRsK777K
0
专业英语八级
相关试题推荐
Peopletendtostrugglewhenlearninganotherlanguage,especiallyiftheyareexposedonlyitwhileattendingclasses.【M1】_____
Doctorsbaffledbyanunexplainedrashonpeople’searsorcheeksshouldbeonalertforaskinallergycausedtoomuch【M1】_____
Doctorsbaffledbyanunexplainedrashonpeople’searsorcheeksshouldbeonalertforaskinallergycausedtoomuch【M1】_____
Afour-yearstudybysociologistsatTheUniversityofManchesterhasfoundthatwomenaremuchlikelythanmento【M1】______mak
ApprenticeshipshavelongbeenpopularinEurope,butworkforce-orientedhighschooltrainingisnearlyascommonin【M1】______U
"Artdoesnotsolveproblems,butmakesusawareoftheirexistence,"sculptorMagdalenaAbakanowiczhassaid.Artseducation,
Todaywomenearnalmost60percentofallbachelor’sdegreesandmorethanhalfofmaster’sandPh.D.’s.Manypeoplebelieveth
A、Onehalf.B、Twofifths.C、Onequarter.D、10%to15%.D本题设题点在数字处。根据句(2)可知,国家卫生研究所提到,总人口中有10%到15%的人患有慢性失眠症,因此[D]为答案。
Culture—theFifthLanguageSkillI.TheunderstandingofcultureA."SoftwareoftheMind"—traditions,valuesand______behav
随机试题
A、AttendingDr.Alberti’slecture.B、Sharingone’sfeelingswithothers.C、Talkingwithasuperior.D、Chattingwithotherpeople
公民、法人或者其他组织认为具体行政行为侵犯其合法权益的,可以自知道该具体行政行为之日起()内提起行政复议的申请。
∫01(x2-2x)dx=().
下列关于地下防水施工的叙述错误的是()。
将自产、委托加工或购买的货物用于非应税项目属于视同销售货物。()
某个村子有个有趣的习俗:村子里所有80岁以上的人都必须说假话,80岁以下的人都必须说真话。你进到村子的时候,看到村子中所有的人围坐一圈,每个男人的两边都是女人,每个女人的两边都是男人。你问一个名为古瓦哈提的村民:你们村子有多少人?古瓦哈
我国历代思想家、教育家有关师德修养的内容有()。
正当防卫:是指为了使国家、公共利益、本人或者他人的人身、财产和其他权利免受正在进行的不法侵害,而采取的制止不法侵害的行为。根据上述定义,下列哪一个属于正当防卫:
设三阶矩阵A的特征值为-1,1,2,其对应的特征向量为α1,α2,α3,令P=(3α2,-α3,2α1),则P-1AP等于().
一般采用________________语言编写.NET项目的配置文件。
最新回复
(
0
)