A:π2
B:π
C:2π
D:4π
查字典
“粗”按部首查字法应查____部,再查____画,组词____
如图,矩形ABCD中,AB=2,AD=4,AC的垂直平分线EF交AD于点E、交BC于点F,则EF=____.
A. Good morning, Cutie!
B. Today is your birthday. Happy birthday!
C. Good morning, Mum!
D. Thank you, Mum
E. Let's cut the cake together.
F. OK. Let's cut!
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