—Do you mind my opening the window to let the fresh air in?—__________. I also would like to breathe in some fresh air.
A:Never mind
B:Not at all
C:That's all right
D:You'd better not
我们把斜向上作用在紧贴竖直静止的物体上的力F分解为如图所示的F1、F2两个分力,则( )