首页
登录
职称英语
A project likely to evolve in the near or intermediate future is spacetouri
A project likely to evolve in the near or intermediate future is spacetouri
游客
2023-11-24
9
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 activity【S1】________
that would not have to rely unpredictable government decisions. It would【S2】________
therefore put space operations on a much more solid, dependable footing
and would enormously expand man’s space activity. If some people see【S3】________
space tourism as a potential multibillion—dollar business, difficult
technical problems remain to be solved.
First, in order to fulfill the dream of space tourism, a manned
reusable rocket like the Venture Star must be built. Then, the second【S4】________
serious problem must be addressed:Even today’s most—advanced space
rockets are able to lift only about 2. 5%of their launch weight into
0rbit—a ratio that has hardly changed in the last 40 years. But it is【S5】________
simply impossible to find other alternations other than a rocket. This【S6】________
unsatisfying fact is a result of the limits of material characteristics and
chemical power sources, and there is no indication which any【S7】________
fundamental breakthrough call be expected in these areas in the
foreseeable future. Then these who have long-cherished dreams of space【S8】________
tourism have to Wait forever.
Operational costs may be somewhat reduced by the use of air-
breathing engines to help a reusable rocket penetrate into the earth’s
atmosphere. Today the highest cost attainable to lift a payload into orbit【S9】________
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 price for a short【S10】________
trip around the world. [br] 【S3】
选项
答案
If—While/Although
解析
连词误用。此处前半句指出“一些人把太空旅行看作是一项潜在的价值数十亿美元的产业”,后半句指出“技术难题仍有待解决”,可见二者不是条件关系,而是转折关系,因此使用While或Although比较合适。
转载请注明原文地址:https://tihaiku.com/zcyy/3214068.html
相关试题推荐
Insomeways,Chinaisanunlikelyhotbedfore-commerce.Only38percentof
PassaqeTwo(1)Oneoftheobviousproblemswithpredictingthefuture
PassaqeTwo(1)Oneoftheobviousproblemswithpredictingthefuture
PassaqeTwo(1)Oneoftheobviousproblemswithpredictingthefuture
PeoplewhohaveInternetaccessathomearemorelikelytobeinarelation
PeoplewhohaveInternetaccessathomearemorelikelytobeinarelation
PeoplewhohaveInternetaccessathomearemorelikelytobeinarelation
PeoplewhohaveInternetaccessathomearemorelikelytobeinarelation
PeoplewhohaveInternetaccessathomearemorelikelytobeinarelation
Predictingthefutureisariskybusinessforascientist.Itissafetosay
随机试题
Shewaspraisedbyherfatherfor______theexam.A、passB、topassC、topassingD、
Fromthepassagewecanknowthatthestoryprobablytakesplacein______.[br]
Anumberoffactorsrelatedtothevoicerevealthepersonalityofthespeak
对
图所示结构的超静定次数为( )。 A.0次 B.1次 C.2次 D.3
既能平肝息风,清肝明目,又能清热解毒的药物是()(2008)A.羚羊角
对重度颅脑损伤病人的补液原则是A、不要限制入液量 B、充分补充晶体液 C、每
三类水闸系指()。A.工程无影响正常运行的缺陷 B.工程存在一定损坏
脑死亡标准取代传统的死亡标准,其直接的伦理意义和效果是() A.有利于科学确定
建设工程项目总进度目标论证时,调查研究和收集资料工作包括()。A.收集类似
最新回复
(
0
)