A:能量的转换
B:内能的转移
C:热量的转移
D:温度的传递
如图,点A,B,C,D在同一条直线上,点E,F分别在直线AD的两侧,且AE=DF,∠A=∠D,AB=DC.
(1)求证:四边形BFCE是平行四边形;
(2)若AD=7cm,DC=2cm,∠EBD=60°,则BE等于多少时,四边形BFCE是菱形.
①Susie want toast two tall postmen some lemonade a thirsty crow
②how do you feel were very hungry
It takes Janet about forty minutes her homework every evening.
下列行为中,属于公民意识不强的是( )