据报道.我国数据中继卫星“天链一号 01 星”于 2008 年 4 月 2 5 日在西昌卫星发射中心发射升空,经过 4 次变轨控制后,于 5 月 l 日成功定点在东经 77 °赤道上空的同步轨道。关于成功定点后的“天链一号 01 星”,下列说法正确的是 A . 运行速度大于 7.9Kg /s B .离地面高度一定,相对地面静止 C .绕地球运行的角速度比月球绕地球运行的角速度大 D . 向心加速度与静止在赤道上物体的向心加速度大小相等
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】In the United States, when one becomes rich, he wants people to know it. And even if he does not become very rich, he wants people to think that he is. That is what keeping up with the Joneses is abou...
A.
want to be as rich as their neighbors
B.
want others to know or to think that they are rich