首页
登录
职称英语
A project likely to evolve in. the near or intermediate future is space tour
A project likely to evolve in. the near or intermediate future is space tour
游客
2024-06-06
6
管理
问题
A project likely to evolve in. the near or intermediate future is space tourism, a purely【B1】______ activity that would not have to rely on unpredictable government decisions. It would 【B2】______ put space operations on a much more solid, dependable footing and would enormously【B3】______ man’s space activity. While some people see space tourism as a【B4】______ multibillion-dollar business, difficult technical problems remain to be【B5】______
First, a manned reusable rocket like the Venture Star must be built. Then, a second serious problem must be【B6】______ : even today’s most-advanced space rockets are able to【B7】______ only about 2.5% of their launch weight into orbit-- a ratio that has hardly changed in the last 40 years. This fact is a result of the【B8】______ of material characteristics and chemical power sources, and【B9】______ .
Today the price of a ticket to space would have to be at least $ 50 000. It is questionable【B10】______ . However, space tourism may become more attractive once space facilities are built【B11】______ . [br] 【B5】
选项
答案
solved
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3622752.html
相关试题推荐
[originaltext]Ateamofscientistsrecentlybeganaprojecttomeasurethe
Largeanimalsthatinhabitthedeserthaveevolvedanumberofadaptationsf
Largeanimalsthatinhabitthedeserthaveevolvedanumberofadaptationsf
Largeanimalsthatinhabitthedeserthaveevolvedanumberofadaptationsf
Largeanimalsthatinhabitthedeserthaveevolvedanumberofadaptationsf
[originaltext]Womenaremorelikelythanmentokeepjointpossessionswhen
[originaltext]Womenaremorelikelythanmentokeepjointpossessionswhen
InthefirstyearorsoofWebbusiness,mostoftheactionhasrevolvedaro
InthefirstyearorsoofWebbusiness,mostoftheactionhasrevolvedaro
InthefirstyearorsoofWebbusiness,mostoftheactionhasrevolvedaro
随机试题
丰富知识enrichone’sknowledge
下列人体组织器官CT值低于0的是A.肝脏 B.甲状腺 C.肺 D.脑白质
抽样中所有可能组成的样本平均数的平均数等于总体平均数。() 即样本均值的
流行性腮腺炎病人应隔离至()A.体温减退 B.精神症状好转 C.进食时不
把不同情况下能量的摄入量与DRIs相比可以判断个体能量摄入量是否达到要求。(
阴盛格阳可形成A:虚热证B:虚寒证C:实热证D:虚实夹杂证E:真寒假热证
B
在近代法制史上,以判例和解释例作为法律渊源的政权有( )。 A.清末政府
下列政府会计主体的资产中,属于非流动资产的是()。A.公共基础设施 B.应
装机容量2X300MW火力发电厂设计中,需进行厂用电系统短路电流、电压调整、电动
最新回复
(
0
)