首页
登录
职称英语
What is the most important factor for a rocket to escape from the Earth? [br] Wh
What is the most important factor for a rocket to escape from the Earth? [br] Wh
游客
2023-10-06
73
管理
问题
What is the most important factor for a rocket to escape from the Earth? [br] Why is it not necessary to provide powered flight in space all the time?
选项
A、Few spacecrafts complete their flight operations.
B、The Earth’s gravity cannot be overcome.
C、No further power is needed after the escape speed is reached.
D、Free fall takes the place of the Earth’s gravity pull.
答案
C
解析
从文章第三段第一句"一旦火箭达到了脱离地心引力的速度,就不再需要更多的能量",可以判断出此题的答案应为C。
转载请注明原文地址:https://tihaiku.com/zcyy/3075565.html
相关试题推荐
Accordingtothepassage,Indiannameswereimportantbecausethey______.[br]
Accordingtothepassage,Indiannameswereimportantbecausethey______.[br]
Accordingtothepassage,Indiannameswereimportantbecausethey______.[br]
Accordingtothepassage,Indiannameswereimportantbecausethey______.[br]
Accordingtothepassage,Indiannameswereimportantbecausethey______.[br]
Whathesays(be)______notimportant.is他说的话并不重要。题中what引导了一个主语从句,后面接单数动词作谓语。
Mannersareimportanttohappyrelationsamongpeople.Everyonelikesapers
Thepurposeofthispassageismainlytotellus______.[br]Themostimportant
Thepurposeofthispassageismainlytotellus______.[br]Themostimportant
Wevisitedthefactoryaweekago;allthefurniture______inChina.A、ismadeB
随机试题
Thewaysofhistoryaresointricateandthemotivationsofhumanactionss
OnWednesday,theTreasuryDepartmentreleasedmoredetailsofitsplantos
[originaltext]M:Hi,Janet.Wherewereyouatlunchtime?Iwassavingaseatfo
以下属于董孝芳的代表作品的是( )。A.《银杏树下》 B.《祖国》 C.《
患儿,女,1岁。怀疑“化脓性脑膜炎”,拟行腰椎穿刺,穿刺点宜选择A.2~3腰椎间
变电站隔离开关分合闸位置“双确认”改造技术规范(试行)要求,姿态传感系统联合性能
教育学是一门以教育现象和教育问题为对象,_的科学。
中国公民崔某10年前因走私案逃亡南海国。南海国与中国没有引渡条约。南海国表示,如
某化工厂对1162名工人的体检结果如下,试问哪一工龄组气管炎患病最严重。 A.
生产性粉尘对人体的危害程度与其理化性质有关。其中与矽肺病的发生最密切的化学特性是
最新回复
(
0
)