—When did your father stop smoking?
—In 1999, the year I was born.
A:put up
B:think up
C:mix up
D:give up
把我国大致分为四大地理区域的界线不包括( )
如图,正△ABC的边长为4,点P为BC边上的任意一点(不与点B、C重合),且∠APD=60°,PD交AB于点D.设BP=x,BD=y,则y关于x的函数图象大致是( )