—My math teacher said I was too lazy.—______________. You should work harder.
A:Good idea
B:I'm sorry
C:Good luck
D:Have a great time
—I don't want to eat___ , Mum. I'm not feeling well.
3个 518 是____ ?
(7.89+4.62)×15=( ____ )×15+4.62×( ____ )
“拓展式”研究性学习小组想研究鲁迅、郭沫若、韩愈、莫泊桑四位作家的作品,借书顺序正确的一项是( )
甲型流感痊愈者的血清能用于治疗甲型流感患者,痊愈者的血清中起治疗作用的是