A:(-3,5),(-6,3)
B:(5,-3),(3,-6)
C:(-6,3),(-3,5)
D:(3,-6),(5,-3)
不开花结果的植物又可以划分为( )
—What about _____ English-Chinese dictionary on the bookshelf?—In my opinion, it's _____ useful tool book for my English learning.
① OA=OC ② AB=CD ③ ∠BAD=∠DCB ④ AD∥BC
请你从中选择两个论断作为条件,以“四边形ABCD为平行四边形”作为结论,完成下列各题: