—What do you think of Harbin and Qingdao in winter?

—I think Harbin is______than Qingdao.

A．interesting

B．the most interesting

C．much interesting

D．much more interesting

金融衍生工具的基本特征有（）

A.杠杆效应

B.跨期交易

C.不确定性和高风险

D.套期保值和投资套利共存