—Excuse me,may I take a seat here? 一____________.The man on the seat has left.
A:You'd better not.
B:No,thanks.
C:Yes,Please.
D:I'm afraid not.
选择合适的词语填空
____小孩 ____银装 ____光芒 ____小鸟
____月亮 ____草地 ____太阳 ____的雪花
受反气旋影响一般出现( )
如图,点C,F在线段BE上,BF=EC,∠1=∠2,请你添加一个条件,使△ABC≌△DEF,并加以证明.(不再添加辅助线和字母)