中华文化源远流长，博大精深，不仅对今天的中国人具有深刻的影响，也对推动世界文化的发展产生重大的影响。 [ ]
√
– How do you feel now?
-- Much _______. I think I can go to school tomorrow.
A．good
B．better
C．best
D．well
等比数列{an}的前n项和为Sn，已知S1，2S2，3S3成等差数列，则{an}的公比为（ ）
