—Let's________.
A:put him up
B:set him up
C:cheer him up
D:clean him up
捐款(元)
10
15
20
50
人数
1
5
4
2
如图,矩形ABCD的对角线AC,BD相交于点O,过点B作AC的平行线交DC的延长线于点E.
(1)求证:BD=BE;
(2)若BE=10,CE=6,连接OE,求tan∠OED的值.