Maybe you should __________.
A:call on her
B:call him at
C:call him up
D:call up her
如图,在△ABC中,点D、E、F分别为BC、AD、CE的中点.若S△BFC=1,则S△ABC=____ .
类型
价格
A型
B型
进价(元/件)
60
100
标价(元/件)
160