组成中含有生地、阿胶的方剂是（）
A.炙甘草汤
B.地黄饮子
C.温经汤
D.大补阴丸
E.肾气丸
参考答案：A
—Are there any fish in the lake now?
—No, _____ any water in it in winter. [ ]
A. there isn't
B. there aren't
C. it isn't
D. they aren't
金融衍生工具的基本特征（）。
A、跨期性
B、杠杆性
C、联动性
D、不确定性
