马可·波罗来华时,盛情款待他的皇帝是( )
A:唐高祖
B:宋太祖
C:元世祖
D:清太宗
In her ____ (判断),it was a wrong thing to give children so much pocket money.
平均风速v(m/s)
5
10
15
20
1s内获得的能量E(×104J)
1
8
27
64