- I don't know Kate's address. Do you know _______?
- Sorry, I don't know, either.
A:why she lives there
B:why does she live there
C:where she lives
D:where does she live
质量为2kg的物体,速度由4m/s变为﹣6m/s,则此过程中,它受到的合外力的冲量为( )
下列各项中没有语病的一项是( )