治疗阳明实证的主要治法是()
A.通便泻热
B.和胃通腑
C.急下存阴
D.攻下实热
E.消滞除满
参考答案:D
已知等比数列{an}的前n项和Sn=54,前2n项和S2n=60,则前3n项和S3n=______.
Do you enjoy ______ the piano? [ ]
A. play
B. playing
C. played
D. plays