【单选题】He came out__ in the track events. A. first B. one C. the first D. the one
【单选题】The first three rows of the hall are ______ for special guests.
【简答题】用树形结构表示实体之间联系的模型是__________。
【单选题】Who is that man, in the front row?
【单选题】Sunday is _____ day of the week. [ ]
【单选题】He is _____ student to go to school. [ ]
【单选题】抽样调查与其他非全面调查比较,具有以下哪些特点