--About 10 minutes' walk.
A:How often
B:How soon
C:How long
D:How far
如图所示,已知AB∥DC,AE平分∠BAD,CD与AE相交于点F,∠CFE=∠E.试说明AD∥BC.完成推理过程:
∵AB∥DC(已知)
∴∠1=∠CFE(____)
∵AE平分∠BAD(已知)
∴∠1=∠2 (角平分线的定义)
∵∠CFE=∠E(已知)
∴∠2=____(等量代换)
∴AD∥BC (____)
为避免出现“废嫡而更立诸弟子,弟子或争相代立”的情形,周朝开始确立( )
It is in the east of England _______ there is no doubt ________ it is going to rain tomorrow.