A:i
B:are
C:ha
D:have
设全集U=R,A=x|y=2x-x2B=y|y=2x,x∈R,则CRA∩B=( )
如图,EF∥AD,AD∥BC,CE平分∠BCF,∠DAC=116°,∠ACF=25°,求∠FEC的度数.