问题 填空题

有机物A~E的转化关系如下所示。1molA能与1molBr2恰好完全反应;E的分子式为C5H10O3, 1molE分别与Na、NaHCO3反应,消耗两者物质的量之比为2∶1,氢核磁共振谱分析E有5组不同的特征峰。F分子结构中含有一个六元环。已知:

(1)E中含有的官能团名称是        ,E的结构简式是                       

(2)写出C→D的化学方程式                              ,反应类型______

(3)写出E→F的化学方程式                               ,反应类型______

(4)E转化为F过程中,可能发生多种副反应,写出含5个碳原子的副产物的键线式

____________________、______________________

答案

(1)羟基(1分)、羧基(1分)   (2分)

(2)2+O22+2H2O(2分)氧化(1分)

(3)2+2H2O(2分)

酯化(1分)

(4)(2分)(2分)

1molA能与1molBr2恰好完全反应,说明A中含有1个碳碳双键,B中含有溴原子,发生水解反应生成C,则C中含有2个羟基。C发生催化氧化,生成D,则D中含有醛基。D继续被氧化,生成E则E中含有羧基。1molE分别与Na、NaHCO3反应,消耗两者物质的量之比为2∶1,说明E中除了羧基,还含有1个羟基,说明与该羟基的相连的碳原子上没有氢原子。氢核磁共振谱分析E有5组不同的特征峰,所以E的结构简式为。E在浓硫酸的作用下发生酯化反应,生成F,则F的结构简式为。由于E中含有羟基,所以也可能发生消去反应生成碳碳双键,其结构简式为

阅读理解

Photos that you might have found down the back of your sofa are now big business!

In 2005,the American artist Richard Prince’s photograph of a photograph,Untitled (Cowboy),was sold for $1 248 000.

Prince is certainly not the only contemporary artist to have worked with so-called “found photographs”—a loose term given to everything from discarded(丢弃的)prints discovered in a junk shop to old advertisements or amateur photographs from a stranger’s family album.The German artist Joachim Schmid,who believes “basically everything is worth looking at”,has gathered discarded photographs,postcards and newspaper images since 1982.In his on-going project,Archiv,he groups photographs of family life according to themes:people with dogs;teams;new cars;dinner with the family;and so on.

Like Schmid,the editors of several self-published art magazines also champion(捍卫)found photographs.One of them,called simply Found,was born one snowy night in Chicago,when Davy Rothbard returned to his car to find under his wiper(雨刷)an angry note intended for someone else:“Why’s your car HERE at HER place?”The note became the starting point for Rothbard’s addictive publication,which features found photographs sent in by readers,such as a poster discovered in your drawer.

The whole found-photograph phenomenon has raised some questions.Perhaps one of the most difficult is:can these images really be considered as art?And,if so,whose art?Yet found photographs produced by artists,such as Richard Prince,may raise endless possibilities.What was the cowboy in Prince’s Untitled doing?Was he riding his horse hurriedly to meet someone?Or how did Prince create this photograph?It’s anyone’s guess.In addition,as we imagine the back-story to the people in the found photographs artists,like Schmid,have collated(整理),we also turn toward our own photographic albums.Why is memory so important to us?Why do we all seek to freeze in time the faces of our children,our parents,our lovers,and ourselves?Will they mean anything to anyone after we’ve gone?

In the absence of established facts,the vast collections of found photographs give our minds an opportunity to wander freely.That,above all,is why they are so fascinating.

小题1:The first paragraph of the passage is used to_______.

A.remind readers of found photographs

B.advise readers to start a new kind of business

C.ask readers to find photographs behind sofas

D.show readers the value of found photographs小题2:According to the passage,Joachim Schmid_______.

A.is fond of collecting family life photographs

B.found a complaining note under his car wiper

C.is working for several self-published art magazines

D.wondered at the artistic nature of found photographs小题3:The underlined word “them”in Paragraph 4 refers to“_______”.

A.the readers

B.the editors

C.the found photographs

D.the self-published magazines小题4:By asking a series of questions in Paragraph 5,the author mainly intends to indicate that_______.

A.memory of the past is very important to people

B.found photographs allow people to think freely

C.the back-story of found photographs is puzzling

D.the real value of found photographs is questionable小题5:The author’s attitude toward found photographs can be described as_______.

A.critical

B.doubtful

C.optimistic

D.satisfied

单项选择题