-- Do you know the: famous basketball player Kobe has said goodbye to the NBA?
-- Yes. I'm afraid l will see him on screen.
A：sometimes
B：often
C：always
D：seldom
一物体做匀变速直线运动，其位移与时间的关系是：s=2t+4t2（m），由此可知（ ）
如图，△ABD是等腰三角形，AB=AD，将△ABD沿BD翻折得△CBD，点P是线段BD上一点，
