— Shall I give you a ride as you live so far away?
— Thank you._________
A:It couldn't be better
B:Of course you can
C:So what?
D:It's up to you
一次函数y=﹣2x﹣1的图象不经过( )
人的上臂以肩关节为枢纽,可做伸屈、旋转、换转等各种动作.这说明关节在运动中起什么作用( )