A:汽车所受阻力为2×103 N
B:汽车在车速为5 m/s时,功率为6×104 W
C:汽车匀加速的加速度为3 m/s2
D:汽车匀加速所需时间为5 s
approve of; last of all; ahead of; senior to; be absorbed in; make an appointment with; defend…against…; work on; set to work; by accident
—It ________be her. Because I saw her go home a moment ago.
下列鸟类中,哪种鸟的雏鸟属于晚成鸟( )