题目

In 2000,Suy Senglim met a French journalist who inspired in him an interest in photography.To put this new-found interest to good use,in 2012 he began to take pictures of Cambodia's vast variety of birdlife. Worried by the loss of biodiversity in his hometown of Mukh Kampul in Kandal province,Senglim created a photography project.He carefully documents each new species he photographs: the common name,scientific name,its identifying features,whether the species is endangered or not.Now the 35-year-old aims to educate Cambodians about the importance of bird species and the effect developm下列物质中，除一种物质外其余三种物质都具有相同的最简式，这种物质是（）A.乙酸乙酯B.甲醛C.乙酸D.葡萄糖