——These plans are all suitable. I haven't decided which one to choose.
——It's OK. You ________ plenty of time to make a decision.
鸦片战争打开了中国关闭已久的大门,被称为中国近代史的开端。其主要依据是( )
如图,在△ABC中,已知点D、E、F分别是BC、AD、BE上的中点,且△ABC的面积为8cm2,则△BCF的面积为( )