如图,点D(0,3),O(0,0),C(4,0)在⊙A上,BD是⊙A的一条弦,则sin∠OBD=( )
A:12
B:34
C:45
D:35
清晨背上小书包,高高兴兴____。
As can be seen in the picture, a boy is rowing a boat trapped in a bottle floating on the surface of the sea. ……