黄芩具有而黄柏不具有的功效是（）
A.燥湿
B.泻火
C.解毒
D.清肺热
E.退虚热
参考答案：D
Was it in 1969______ the American astronaut succeeded ______ landing on the moon?
A．when; on
B．that; on
C．when; in
D．that; in
简析弥尔顿《失乐园》的主题。
