考题abcd (1)当边FG刚好经过c点,∠ CFB = 60,BF=3﹣t,在Rt△CBF,BC=2,tan∠CFB=,即tan60=,BF=2,即3 ﹣.(2)当0 ≤ t < 1时,s = 2t+4;当1 ≤ t < 3时,s =-T2+3t+;当3 ≤ t < 4时,s =-4t+20;当4 ≤ t < 6时,s = T2-12t+36;省略