【单选题】-Your English is very good. Who taught you? -Nobody. I taught ______.
【单选题】Who taught ____ Japanese? I learned by _______.
【单选题】下面属于旅游管理信息系统的特定特征的是( )
【单选题】—Who taught Japanese? —I learned it by .
【单选题】—_____ do you visit your teacher who taught you years ago? —Once a year. [ ]
【单选题】图中为一称曼月乐的节育器,其纵管内含有一种激素类药物,释放出此药后达到避孕效果.此激素为( )