—We missed a chance to win a goal.—__________!
A:Well done
B:Good luck
C:What a shame
D:How lucky
疲劳—____ 舒适—____ 特殊—____ 呼吁—____
已知{an}为正项等比数列,Sn是它的前n项和.若a1=16,且a4与a7的等差中项为98,则S5的值( )