交叉渡线是由四组单开道岔及一个（）组成。
参考答案：菱形交叉
After _____ seemed an endless wait, it was his turn to have the interview. [ ]
A. what
B. that
C. when
D. which
宋明理学家大多倡导“存理去欲”或“存心去欲”的修养论、“格物”或“格心”的认识论、“成贤成圣”的境界论、由齐家而平天下的功能论。其目的是（）①巩固封建统治②培养社会责任感③维护社会稳定④禁绝个人欲望
A.①
B.②④
C.①②③
D.①②③④
