问题 填空题

(8分)红外光谱、质子核磁共振谱(PMR)是研究有机物结构的重要方法之一。

(1)在研究的化合物分子中——所处环境完全相同的氢原子在PMR谱中出现同一种信号峰。如(CH3)2CHCH2CH3在PMR谱中有4种信号峰。又如CH3-CHBr=CHX存在着如下的两种不同空间结构: 因此CH3-CHBr=CHX的PMR谱上会出现氢原子的四种不同信号峰。在测定CH3CH=CHCl时,能得到氢原子给出的6种信号峰。由此可推断该有机物一定存在     种不同的结构,

其结构简式分别为:                                                  

(2)有机化合物A含碳77.8%,氢为7.40%,其余为氧,A的相对分子质量为甲烷的6.75倍。

①通过计算确定该有机物的分子式            

②红外光谱测定,A分子结构中含有苯环和羟基。在常温下A可与浓溴水反应,1molA最多可与2molBr2作用,据此确定该有机物的结构有    

写出其中一种与溴水反应的化学方程式                                     

答案

(8分)(1)2、(3分)

(2)① C7H8O   (2分)②2种。(1分)

(2分)

阅读理解

.

第三部分:阅读理解(共20小题,每小题2分;共40分)

阅读下面短文,掌握其大意,然后从各题的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。

Several interesting American museums tell about health subjects. One is the Doctor Samuel D. Harris National Museum of Dentistry. It is at the University of Maryland in Baltimore. That is where the first college in the world to train dentists began. The museum tells about the history of the medical treatment of teeth. Visitors can see some frightening devices that once were used to remove infected teeth. They also can see sets of teeth made of animal bone. They were made for a famous American —— the first President, George Washington.

Most people do not consider a visit to the dentist their idea of a good time. However, the director of the museum says he wants to make the museum a funny place to visit. He says he also wants to teach visitors about the importance of taking care of their teeth.

Another museum collects devices that help people hear. The Kenneth W. Berger Hearing Aid Museum is at Kent State University in Kent, Ohio. The museum has more than three-thousand hearing aids from around the world. They include old and strange devices. Some hearing aids were made to look like other objects. That is because in the past many people did not want anyone to know they were wearing a hearing aid.

56. It is common for people to think it uneasy to pay a visit to ____.

A. the University of Maryland            B. the Museum of Dentistry

C. the Hearing Aid Museum              D. the dentist

57. The text mainly tells about _____.

A. museums in the US               B. interesting American museums

C. American museums with health subjects

D. the history of the medical treatment of teeth

58. What do we learn about George Washington from the text?

A. He once visited the National Museum of Dentistry.

B. He considered the Museum of Dentistry a fun place to visit

C. His artificial (人造的) teeth were collected in the National Museum of Dentistry.

D. His teeth seemed to be made of animal bone.

59. The underlined word “devices” in the first and last paragraph probably means _____.

A. ways        B. strategies        C. tools          D. desires

单项选择题