我国自行设计制造并投入成批生产和大量装备部队的第一种飞机是哪一架飞机?
参考答案:
歼教6
_______ reason you may give , you ought not to have left homework unfinished.
A.What
B.No matter
C.However
D.Whatever
小虎经常流鼻血,牙龈出血(坏血病的症状),应多食( )
A.猪肉和鲫鱼
B.鸡蛋和鸭蛋
C.玉米和稻米
D.新鲜蔬菜和水果