简述福禄贝尔的幼儿教育思想。
固体吸附剂采样管的最大采样体积是指采样管流出气出现的被采集物浓度是进入气中浓度的多少时的采样体积（） ["20%","15%","10%","5%","1%"]
股骨颈内收型骨折Pauwells角为（） [">50°","=50°","<50°",">30°","<30°"]
多处闭锁，小肠肠管成小香肠形，且肠系膜缺损为（） ["A.肠闭锁Ⅰ型 ","B.肠闭锁Ⅱ型 ","C.肠闭锁Ⅲ型 ","D.肠闭锁Ⅳ型 ","E.肠狭窄"]
流动相为气体，固定相为固体的色谱法，叫作（） ["液相色谱法","气液色谱法","离子色谱法","气固色谱法","气相色谱法"]
利润表
