A:CH3CH=CHCH(CH3)2
B:CH3CH=C(CH3)CH2CH3
C:(CH3)2C=CHCH2CH3
D:HC≡CCH2CH(CH3)2
如图,⊙O是△ABC的外接圆,AE平分∠BAC交⊙O于点E,交BC于点D,过点E做直线l∥BC.
—Our class will have a party the evening of June 30th. Would you like to come? —Yes, I'd love to, but I'm going to visit my grandparents in Dalian.