挑战习题
1/5单选题
难度:

1.

如图,在Rt△ABC中,∠BAC=90°,E,F分别是BC,AC的中点,延长BA到点D,使AD=AB,连接DE,DF,下列结论中不正确的是( )

青果学院


A

EF=AD

B

EF∥AB

C

AF与DE互相平分

D

AF与DE互相垂直

提示1:
PHA+6L+e5o6lRUbjgIFBRe+8jDwvcD4=
提示2:
PHA+6K+B5Zub6L655b2iQUVGROaYr+W5s+ihjOWbm+i+ueW9ojwvcD4=
正确答案:RA==
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