A:have you been to Shanghai to visit the World Expo
B:Where was the 16th Asian Games held
C:if you were going to Xi’an to visit the Horticultural Exposition (园艺博览会)
D:When will you go to Xi’a
如图:已知在△ABC中,AB=AC,D为BC边的中点,过点D作DE⊥AB,DF⊥AC,垂足分别为E,F.求证:△BED≌△CFD.
法国的萨特说:“人从他被投入到这个世界的那一刻起,就要对自己的一切行为负责”这句话告诉我们 ()
第5个图案中有白色纸片____张.