The talent show is the game show. I like both.
A:as boring as
B:not so bored as
C:as interesting as
D:not so interested as
如图,在直角梯形ABCD中,AD∥BC,∠A=90°,AB=BC=4,DE⊥BC于点E,且E是BC中点;动点P从点E出发沿路径ED→DA→AB以每秒1个单位长度的速度向终点B运动;设点P的运动时间为t秒,△PBC的面积为S,则下列能反映S与t的函数关系的图象是( )
已知三点A(﹣1,﹣1),B(3,1),C(1,4),则向量BC→在向量BA→方向上的投影为( )