关于机械能,下列说法中正确的是( )
A.汽车匀速下坡机械能不变
B.人造地球卫星在远地点势能最小
C.带动钟表转动的发条,将势能转化为动能
D.运动的物体只有动能
答案:C
— May I help you?
— Yes, I'd like to try on some sports jackets just like___________I'm wearing.
A.it
B.one
C.the one
D.that
______成立时,称X→Y为平凡的函数依赖。