17. It’s said ______ ______ was everything _______ Mr. Professor could tell us. A. that; what; all B. what; that; that C. that; that; that D. what; that; what 答案:C根据消化系统模式图,分析回答下列问题:(1)消化系统的开始部位是[ ] ,其内有 和 ,分别能 食物和 食物,这种消化食物的方式属于 性消化.(2)人体内最大的消化腺是[ ] 能分泌 (3)[1]是 ,能分泌 ;[6]是 ,能分泌 .(6)图中的[3]是 ,[9]是 .