whichadj.哪一个；哪一些pron.哪一个；哪些Which class is he in?直通中继线Which exit do I take?直达列车Which platform is it?直流Which would you like?n.通过站Which is the hot tap?大修Which one is Liu Wei?adj.过境的n.过境直达Which are his books ?下承式桥,下承桥Which is the largest?哪一个最大?Which form do I need?[计] 通过短语Which game are you in?长铰刀