A:having been o
B:had begu
C:had been o
D:had been started
A型销售数量(台)
B型销售数量(台)
总利润(元)
5
10
2 000
2 500
He ____ ____ ____ win the game to stay in the match.
在数学课上,老师请同学思考如下问题:
小轩的主要作法如下:
老师说:“小轩的作法正确.”
请回答:⊙P与BC相切的依据是____.