题目

【化学——选修5：有机化学基础】（15分）       已知某有机物A为烃类化合物，其相对分子质量为70，各物质之间的转化关系如下图所示，其中B、D、E的结构中均含有2个甲基，且核磁共振氢谱都有4个峰。      （1）A的分子式为     ，D中所含官能团的名称为     。       （2）I的反应条件为      ，Ⅲ的反应类型为      。       （3）写出反应Ⅳ中①的化学方程式     。       （4）写出反应Ⅴ的化学方程式     。     �语法填空（根据提示写出正确答案）（1）Sorry, I can't read the (express) on her face. I don't know how to please her.（2）Though they hadn't met for many years, they (recognize) each other at first sight.（3）Mrs. Black took her children to the same place she visited two years ago.（4）The part that our army (play) flood control is very important.（5）Visitors are requested not (touch) the pictures in the museum.（6）The officer commanded that all the soldiers (start) at once.（7）A road goes (straight) from the school to our village.（8）—Tom, you are late again.—Yes, that's my bike broke down on the way.（9）It is so nice to hear from her. Believe it , we last met more than ten years ago.（10）He usually speaks dialect, so it is hard for everyone here to understand him.（11）As I know, there is no car in this neighborhood.（12）I don't like the way in he talks and laughs.（13）The great science and technology play in our daily life is seen everywhere.（14）What good command of English he has!（15）The old pianist wouldn't listen to our repeated request that he (play) in public again.