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
Read the following passages, eight sentences have been removed from the article. Choose from the sentences A-H the one which
Read the following passages, eight sentences have been removed from the article. Choose from the sentences A-H the one which
admin
2017-04-19
32
问题
Read the following passages, eight sentences have been removed from the article.
Choose from the sentences A-H the one which fits each gap.
For each gap(1-8)mark one letter(A~H)on the Answer Sheet.
Buzz Aldrin, the second man to walk on the Moon, is a long-time fan of space tourism. Aldrin climbed out of Apollo 11 hot on the heels of Neil Armstrong in 1969. 【R1】______
Together with scientists from Purdue University, the Massachusetts Institute of Technology, and the University of Texas, Aldrin is designing spacecrafts that would perpetually cruise between Earth and Mars.【R2】______"Some day, people will go to Mars on a regular basis," says team member James Longuski, a professor at Purdue. "【R3】______"
The average distance between Mars and Earth is 48 million miles. 【R4】______
It sounds like a trip that would require a lot of fuel. According to the engineers, the cyclers may have a natural, renewable "fuel" supply: from the gravitational forces of the Sun, the planets, and their moons.
As a spacecraft travels close to a planet, its flight path is bent, causing it to whip around the planet and significantly increasing its speed(it’s as if the planet’s gravity gives the passing spacecraft a kick into space).【R5】______It’s not just science fiction: it might help us get Mars with very little fuel on board, in a journey that would take as little as six to eight months.
"The cycler is essentially in orbit around the Sun and makes regular flybys of Earth and Mars," says James Longuski. "Once you put your vehicle into a cycler orbit, it continues on its own momentum, going back and forth between Earth and Mars.【R6】______"
When the cycler flies by Earth, it will be traveling at a speed of about 13,000 miles per hour.【R7】______"This is sort of like a bus that doesn’t stop," Longuski says. "When it comes by, you have to run alongside of it and grab on."
Aldrin and his group think that the first cycler could be on its way by as soon as 2018. 【R8】______ (It seems a long way off now, but it’s closer than you think!)
Fasten your seatbelts and make sure your seatback is in its upright position. Your flight to space may be departing soon.
A. These crafts, known as "cyclers", would ferry people and supplies between the two planets, enabling humans to colonize Mars — something that has long been dreamed about in science fiction.
B. Most people are convinced that we are going to do this; the only question is when.
C. So, if you’re in middle school now, you could be taking a trip to Mars by the time you’re in your thirties.
D. To get a sense of just how far this is, try doing this calculation: Given that there are 2,500 miles between New York and Los Angeles, how many times would you have to travel from NY to LA and back to cover the same distance?
E. Now, at the age of 72, Aldrin is working on a new project that could put more of his fellow humans in space — namely, on journeys to one of our most fascinating neighbors, Mars.
F. This is the "slingshot" trajectory that you may have seen in movies.
G Space taxis will be needed to bring people from the surface of the planet to intercept the cycler. H. You may need to carry some propellant for an occasional boost, but it’s pretty much a free trip after that.
【R8】
选项
答案
C
解析
第8段第1句介绍了第1个“骑车人”投入使用的时间是2018年。句C以另一种方式来介绍这个时间究竟离人们多远:如果你现在在中学上学,那么在你30多岁的时候就可以去火星旅行了。因此答案为C。
转载请注明原文地址:https://kaotiyun.com/show/oG9d777K
本试题收录于:
BFT阅读题库国际化人才外语考试(BFT)分类
0
BFT阅读
国际化人才外语考试(BFT)
相关试题推荐
Youareaskedtowriteacompositioninwhichyougiveyourownopinionsonthefollowingstatement.Face-to-facecommunicat
Yougotaletterfromacompanymanager,JimGreen.Dec.1st,20
Readthefollowingstatement:Onlyunderofficiallawsoradministrativeregulationscanwedefendastableandreliableexa
Lookatthefollowingadvertisement.ChinaDailyWewouldliketohearyouropinionsaboutthei
Writeaboutthefollowingtopic:Technologygivesyoungpeopletodayknowledgeandpowerthattheyhaveneverhadbefore.Th
HereisaletterfromColoradoStateUniversitytoinformtheapplicantMr.LithathehasbeenadmittedtoCognitivePsychology
HereisaletterfromColoradoStateUniversitytoinformtheapplicantMr.LithathehasbeenadmittedtoCognitivePsychology
Youareaskedtowriteacompositioninwhichyougiveyourownopinionsonthefollowingstatement:Face-to-facecomm
Readthefollowingletterandcompletethegiveninformationform.Writeaword,phraseornumberinthespaces1-5.De
Readthefollowingletterandcompletethegiveninformationform.Writeaword,phraseornumberinthespaces1-5.De
随机试题
设f(x)=试用归结原则证明x0≠0时不存在.
依照我国宪法规定,中华人民共和国的一切权力属于人民。人民行使国家权力的机关是()
下列是对文章标题中表示文体的字的解释,有错误的一项是()
早产儿使用铁剂预防贫血最初的月龄是()
甲遗失手链1条,被乙拾得。为找回手链,甲张贴了悬赏500元的寻物告示。后经人指证手链为乙拾得,甲要求乙返还,乙索要500元报酬,甲不同意,双方数次交涉无果。后乙在桥边玩耍时手链掉入河中被冲走。下列哪一选项是正确的?(2017年卷三6题,单选)
根据现行财务制度的规定,在施工企业中,对于技术进步较快或使用寿命受工作环境影响较大的施工机械和运输设备,经财政部批准,计提折旧时可以采用的方法有()法。
国有金融、保险企业的存贷、汇兑、转账凭证、保险凭证属于()发票。
企业从事国家重点扶持的公共基础设施项目的投资经营的所得,适用的企业所得税优惠政策是()。
下列说法不正确的是:
要显示当前过程中的所有变量及对象的取值,可以利用的调试窗口是( )。
最新回复
(
0
)