【简答题】(10分)化合物A、B和C的分子式均为C 7 H 8 O 2 。它们分别在催化剂作用和一定反应条件下加足量的氢,均生成化合物D(C 7 H 12 O 2 )。D在NaOH溶液中加热反应后在酸化生成E(C 6 H 10 O 2 )和F(CH 4 O)。 A能发生如下转化: 生成物N分子中只有3种不同化学环境的氢,它们的数目比为1∶1∶3。 9-1 画出化合物A、B、C、D、E、M和N的结构简式。 9...
【简答题】A.Your education and your reasons for applying for the job. B.Your school work and family. C.Your strong points and age. D.Your education and your further education.
【简答题】What is the hottest topic at your school? In Hangzhou Yongjin Middle School, it's money. The school ran an activity called' a living 'recently. About 800 Junior1 and Junior 2 students were divi...
【简答题】Dear Kitty, Thank you for your email. In your , you tell something about your school in America. And I a lot about you and your school. Now let you know something about me and my . I am a(an) boy. I w...