Who
What
Where
John
jumping
under the tree
Amy
reading
in the study
Lily
listening to music
at school
Sam
sleeping
in the bedroom
若方程mx-2y=3x+4是二元一次方程,则m满足( )
吐鲁番盆地有“早穿皮袄午穿纱”的说法,这说明当地( )
如图,在△ABD和△FEC中,点B,C,D,E在同一直线上,且AB=FE,BC=DE,∠B=∠E.求证:∠ADB=∠FCE.