“神舟十号”与“天宫一号”在对接前,在各自轨道上运行,它们

 “神舟十号天宫一号在对接前,在各自轨道上运行,它们的轨道如图所示,假定它们都做匀速圆周运动,则:

A. 宇航员在神舟十号上不受地球引力作用

B.“天宫一号的运行周期比神舟十号

C.“天宫一号的加速度比神舟十号

  D. “神舟十号运行速度较大,要减速才能与天宫一号对接

答案

B

相关题目

若△ABC∽△DEF,相似比为1:3,则△ABC与△DEF的面积比为 A.1
若△ABC∽△DEF,相似比为1:3,则△ABC与△DEF的面积比为 A.1:9              B.1:3           C.1:2            D. 1:  
Cold weather can be hard on pets,just like it can be hard on people. Sometimes
Cold weather can be hard on pets,just like it can be hard on people. Sometimes owners forget that their pets are just as used to the warm shelter(住所)as they are. Some owners will leave their a
--Lily,where is your father now?Go and get him for lunch. --Just a moment
--Lily,where is your father now?Go and get him for lunch. --Just a moment,please.Father______a phone call in his room. A.makes B.is making  C.was making
中共探索建设社会主义道路的良好开端是 A.新中国的成立 
中共探索建设社会主义道路的良好开端是 A.新中国的成立                 B.三大改造完成 C.土地改革的完成               D.中共
 I wanted to know _________, but no one would like to tell me.    A. what d
 I wanted to know _________, but no one would like to tell me.    A. what did the old man say    B. how did the old man come    C. whether the old man would come    D. who the old man went
“它排除了丞相个人专断,相权过大威胁皇权而出现的政治
“它排除了丞相个人专断,相权过大威胁皇权而出现的政治危机,而且增强了决策施政的程序性和合理性,提高了行政效率。”材料中的“它”是指  
绕地球运行的航天站中(      ) A.可用弹簧秤测物体重力的
绕地球运行的航天站中(      ) A.可用弹簧秤测物体重力的大小           B.可用天平测物体的质量 C.可用托里拆利实验测舱内的气压        
安徽省某中学气象兴趣小组,根据亚欧大陆局部地区等压线
安徽省某中学气象兴趣小组,根据亚欧大陆局部地区等压线分布形势图,探究该省秋末冬初天气变化状况。据此完成问题。 1.根据上图,学生绘制了

最新题目