Tony said that she must feel very unhappy to say that. Claire thought it was ridiculous to be offered by a robot.
A:scissors
B:section
C:skin
D:sympathy
某简单几何体的三视图如图所示,其正视图.侧视图.俯视图均为直角三角形,面积分别是1,2,4,则这个几何体的体积为 ( )
(Ⅰ)求f( π12 );
(Ⅱ)求f(x)的最大值和单调递增区间.