—It surprised you, didn't it?But she was once really thin.
A:Jia Ling's
B:of Jia Ling
C:of Jia Ling's
三角形的周长是24cm,三边长是三个连续的自然数,则三边长为____。
已知某星球的质量是地球质量的81倍,半径是地球半径的9倍.在地球上发射一颗卫星,其第一宇宙速度为7.9km/s,则在某星球上发射一颗人造卫星,其发射速度最小是多少?