A:张骞
B:项羽
C:甘英
D:董仲舒
汽车自身质量/kg
1150
汽车热机的效率
25%
____的铁球 ____的科学家 ____的感触
____地呼喊 ____地责备 ____地痛哭
Parents should let their children make their own ____ (decide).