Mocky's nut isn't the ground.
A:in
B:under
C:on
某同学依据对自家水稻田的实地调查,绘制了如下食物网简图。请你判断:
已知∠AOB=60°,从点O引射线OC,使∠AOC=40°,作∠AOC的角平分线OD,
(1)依题意画出图形;
(2)求∠BOD的度数.