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
2019-03-04
4
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/WY9d777K
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
Writeaboutthefollowingtopic:Technologygivesyoungpeopletodayknowledgeandpowerthattheyhaveneverhadbefore.Th
HereisaletterfromColoradoStateUniversitytoinformtheapplicantMr.LithathehasbeenadmittedtoCognitivePsychology
HereisaletterfromColoradoStateUniversitytoinformtheapplicantMr.LithathehasbeenadmittedtoCognitivePsychology
YougotaletterfromJimGreen,apersonworkingatthemarketingdepartmentofacompany.
Readthefollowingstatement:Onlyunderofficiallawsoradministrativeregulationscanwedefendastableandreliableexa
Therehavebeenmanytechnologicaldevelopmentsinthe20thcentury,forexample,computersandelectricpower.Chooseeitherof
Readthefollowingarticleandanswerquestions19-25.Forquestions19-25,choosethecorrectanswerA,B,CorD.Mark
Readthefollowingarticleandanswerquestions9-18onthenextpage.HappinessSecretsforToughTimes1.
随机试题
FieldsandBranchesofAnthropologyLiteralmeaningofanthropologyBohannan:eachsciencehasitsdefinitionofhuman.—【
下列关于颅骨的描述正确的是
A.上下唇的游离缘,即皮肤和黏膜的移行区B.唇红和皮肤的交界处C.上唇的整个唇红缘,呈弓背状D.唇弓两侧的最高点E.上唇正中唇红呈珠状向前下的突起唇珠是
治疗伤寒和副伤寒病的首选药物是
A、指由药物的治疗作用所引起的不良反应B、指药物有效成分降解产生有害物质C、指由遗传因素人体产生的不良反应D、指由抗原抗体的相互作用引起的不良反应E、指某些药物因被反复应用导致使用者瘾癖的特性变态反应的含义是(
以下说法不正确的有( )。
如图1,该壁画所在的石窟是()。
党和国家为完成一定历史时期的教育发展目标和任务,依照党和国家在一定历史时期的基本任务、基本方针所确定的关于教育工作的策略、方针和行动准则是()。
胡萝卜在我国民间被称为“小人参”,胡萝卜素经过消化器官吸收后,可以转化成()。
有如下程序:#include<iostream>usingnamespacestd;classBase{intx;public;Base{intn=0};x(n){cout<<n;}
最新回复
(
0
)