目前我国已成功申报的21项世界文化遗产中，有一半以上与( )有关。
A．汉文化
B．唐文化
C．宋文化
D．明文化
参考答案：D
He doesn't feel ________, ________ he has to see a doctor. [ ]
A. good enough, but
B. well enough, but
C. good enough, so
D. well enough, so
重液和重悬浮液有何区别？
