题目

己知某有机物C6H12O2酸性条件下能发生水解反应生成A和B, B能氧化成C。若A、C都能发生银镜反应，则C6H12O2符合条件的结构简式有（不考虑立体异构） A.3种      B.4种       C.5种        D.6种 答案：BOne-room schoolhouses can still be found in _____ areas where there are no other schools for many miles. A.disposed  B. deserted  C. isolated  D. abandoned