题干
He was so _____ when he heard the ______ news that he got the first prize in the contest.
A：exciting, exciting
B：exciting, excited
C：excited, excited
D：excited, exciting
答案(点此获取答案解析）
D
v1．已知某星球的半径为r,它表面的重力加速度为地球表面重力加速度g的
,不计其他星球的影响,则该星球的第二宇宙速度( )
