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【简答题】
重要的化工原料F（C 5 H 8 O 4 ）有特殊的香味，可通过以下流程合成： 已知：①X是石油裂解气主要成分之一，与乙烯互为同系物； ② ； ③C、E、F均能与NaHCO 3 反应生成气体。 （1）X加聚产物的结构是 ； （2）D中所含官能团的名称是 ； （3）反应②的化学方程式为 ，反应类型是 ； 反应⑥的化学方程式为 ； （4）F的同分异构体很多，其中一种同分异构体只含有一种官能团，在酸性或碱性条件下水解生成两种有机物，该同分异构体的结构是 。
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举一反三
【单选题】He is deeply _______ in the trouble of his company.
A.
involved
B.
occurred
C.
packed
D.
represented
【单选题】The student didn’t pay any attention to the lecture; he ________ of something else.
A.
thought
B.
had thought
C.
would think
D.
was thinking
【单选题】When deeply lost in thought, _______ he often was, he would forget all about eating or sleeping.
A.
that
B.
where
C.
which
D.
when
【单选题】What’s Cindy’s suggestion on the cover of Fred’s report?
A.
Change it.
B.
Put the logo on it.
C.
It looks perfect.
【单选题】When deeply absorbed in work, ________ he often was, he would forget all about eating or sleeping.
A.
that
B.
which
C.
where
D.
when
【单选题】When deeply absorbed in work, _______he often was, he would forget all about eating or sleeping.
A.
where
B.
that
C.
what
D.
as
【多选题】根据我国公司法的有关规定，股份有限公司申请其股票上市的条件有( )。
A.
股票已经核准公开发行
B.
公司股本总额不少于人民币3000万元
C.
向社会公开发行的股份必须达公司股份总数的25%以上
D.
公司最近3年无重大违法行为
【简答题】根据对话内容，选择正确的选项，两项多余。 Doctor: What's the matter with you, Cindy? Cindy: 1.________ Doctor: When did it start? Cindy: 2.________ Doctor: Please lie down on the bed and I'll examine you. Cindy: Yes, doct...
【单选题】Which of the followings is NOT the study's disadvantage?
A.
It didn't pay much attention to elderly people.
B.
It didn't focus on a group targeted by brain-game makers.
C.
It didn't take benefits of intense training into consideration.
D.
It didn't take the random brain exercise into consideration.
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