首页
登录
职称英语
A project likely to evolve in the near or intermediate future isspace touri
A project likely to evolve in the near or intermediate future isspace touri
游客
2023-11-29
34
管理
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. [br] 【S4】
选项
答案
the—a
解析
冠词误用。此处then表示“然后”,而second并不是表示第二个,而是表示“另一个”问题,因此不需要定冠词the来修饰。如果用the的话,then和the second就语义重复了。
转载请注明原文地址:http://tihaiku.com/zcyy/3228142.html
相关试题推荐
Oneoftheobviousproblemswithpredictingthefutureeffectsofclimatech
Oneoftheobviousproblemswithpredictingthefutureeffectsofclimatech
PassageFour[br]Whatisthispassagemainlyabout?Thedevelopmentandfutureo
PassageFour[br]WhatseemstobeaneffectofthepilotprojectinSpain?Tohe
Womenweremorelikelythanmentoreporthavingunderstandingsaboutsafer
Womenweremorelikelythanmentoreporthavingunderstandingsaboutsafer
Womenweremorelikelythanmentoreporthavingunderstandingsaboutsafer
Womenweremorelikelythanmentoreporthavingunderstandingsaboutsafer
Youngpeoplearefacinganuncertainfuture.Asthe21stcenturydawned,the
Youngpeoplearefacinganuncertainfuture.Asthe21stcenturydawned,the
随机试题
ChristmasDayis______.[br]Whatisthebestgreeting(打招呼)earlyonthemorni
Sometimesthingshappentoyouthatseemhorrible,painful,andunfairatfi
A. B. C. D.
药品经营企业对医疗机构退回的药品:()A.视同进货,进行正式验收后方可入
下列哪种说法符合非霍奇金淋巴瘤A.外周血白细胞多数增加B.晚期病人骨髓中常有淋巴
甲公司2019年年初“坏账准备”的余额为15万元,“应收账款”、“应收票据”和“
与儿童最初的情绪反应相联系的需要是( )。A.社会性需要 B.归属和爱的需要
张某和李某婚后以共有财产买了一套房子,只登记在张某的名下,张某欲出售这套房子,
某工程项目发生了工程质量事故,造成2人死亡,直接经济损失6000万元,该事故的等
下列关于医学行为目的和手段的认识不正确的是A.医务人员选择的医学手段应该是经过医
最新回复
(
0
)