请以红茶为例，说明怎么根据汤色来鉴别红茶质地的好坏？
参考答案：
红艳明亮为优、红艳欠明为良、红暗淡浊为差。
—When did you go to the United States?
-- I remember _______ there when I was ten.
A．having taken
B．to be taken
C．being taken
D．to take
一级科目编码必须按财政部的统一编码方案进行编制。( )
