1.2对 3对
DC BD平分∠ABC DE⊥AB DC⊥BC
8 2 8
2.3cm
3.HL BC ∠C
4.B
5.C
6.A
12-30页
7.标∠BAD为∠1,∠FAD为∠2
∵AD是∠BAC的平分线
∴∠1=∠2
∵DE⊥AB DF⊥AC
∴∠E=∠DFA=∠DFC=90°
在△AED与△AFD中
∠1=∠2
∠E=∠DFA
AD=AD
△AED≌△AFD
∴FD=ED
在Rt△DEB与△RtDFC
DB=DC
ED=FD
DEB≌DFC
BE=CF
8.存在
5个
1.nicer
fifth
one
asking
to help
the best
carefulier
Do
to buy
kinfes
2.CBBDDBAACBACDAD
3.Would you like watch the world cup now?
What does he want to be when he grow up?
Yes they are.
What are they going to do this evening?
There is a photo on that desk.
4.见62页
1.bo ji
kua
fu
si 作者: admin 时间: 2013-1-27 06:51