问题 填空题

(8分)(一)糖类、油脂、蛋白质都是人体必需的营养物质。

(1)油脂被摄入人体后,在酶的作用下水解为高级脂肪酸和________(写名称),进而被氧化生成二氧化碳和水并提供能量,或作为合成人体所需其他物质的原料。

(2)氨基酸是组成蛋白质的基本结构单元,其分子中一定含有的官能团是氨基(—NH2)和________(写结构简式或名称)。人体中共有二十多种氨基酸,其中人体自身________(填“能”或“不能”)合成的氨基酸称为人体必需氨基酸。

(3)淀粉在淀粉酶的作用下最终水解为葡萄糖(C6H12O6),部分葡萄糖在体内被氧化生成二氧化碳和水。写出葡萄糖在体内被氧化的化学方程式:

_______________________________________________________________________________________________________________________________________________。

(二)《茉莉花》是一首脍炙人口的江苏民歌。茉莉花香气的成分有多种,乙酸苯甲酯()是其中的一种,它可以从茉莉花中提取,也可以用甲苯和乙醇为原料进行人工合成。一种合成路线如下:

(1)C的结构简式为________________________________________________________。

(2)写出反应①的化学方程式:______________________________________________。

(3)反应③的反应类型为________________________________________________。

答案

(一)(1)甘油 (2)—COOH或羧基 不能

(3)C6H12O6+6O2―→6CO2+6H2O

(二)(1)  (2)2CH3CH2OH+O2Cu△2CH3CHO+2H2O (3)酯化(或取代)反应 (4)②

(一)油脂属于高级脂肪酸甘油酯;氨基酸结构中含有氨基和羧基两种官能团;葡萄糖在人体内被氧化生成CO2和H2O,反应提供人体所需能量。

(二)乙醇催化氧化得到A为乙醛,乙醛氧化得到B为乙酸;发生水解得到C为,反应③为羧酸和醇的酯化反应;反应②2CH3CHO+O2―→2CH3COOH,该反应中无副产物生成。

阅读理解

阅读理解。

     A boy was born to a couple after eleven years of marriage. They were a loving couple and loved the boy

very much. When the boy was around two years old, one morning the husband saw a medicine bottle open.

He was late for office so he asked his wife to cap the bottle and put it back into the cupboard in the bathroom.

However, his wife, busy in the kitchen, totally forgot the matter.

     The boy saw the bottle and playfully went to the bottle fascinated by its color and drank it all. It happened

to contain a kind of medicine for adults with poisonous and side effects. When the child broke down, the

mother hurried him to the hospital. But he finally died. The mother was shocked. She was terrified how she

was going to face her husband.

     When the desperate father came to the hospital and saw the dead child, he looked at his wife and voiced

just five words. The husband just said "I am with you, Darling". The husband's totally unexpected reaction is

a positive behavior. The child is dead. He can never be brought back to life. There is no point in finding fault

with the mother. Besides, if only he had taken time to keep the bottle away, this would not have happened.

No one is to be blamed. she had also lost her only child. What she needed at that moment was comfort and

sympathy from the husband. That is what he gave her.

     If evervone can look at life with this kind of viewpoint, there would be much fewer problems in the world.

Take off all your envies, jealousies, unforgiveness, selfishness, and fears and you will find things are actually

not as difficult as you think. Sometimes we spend time asking who is responsible or whom to blame, whether

in a relationshlp, in a job or with the people we know. By this way we miss out some warmth in human

relationship.

1. The uncapped medical bottle was not put back into the cupboard because _____. [ ]

A. the husband was careless

B. the husband was busy

C. the wife wasn't infomed of the matter

D. the wife ignored the matter

2. What do we know about the bottle? _____. [ ]

A. It contained poison only for adults

B. It appeared like a nice drink

C. It was broken by the child

D. It was kept in the kitchen

3. The husband's attitude towards his wife can be described as _____.[ ]

A. optimistic

B. confident

C. considerate

D. generous

4. What did the writer intend to tell us about life? _____. [ ]

A. Let go the negative side and we can enjoy life

B. It is always useless finding who is responsible

C. Think of nothing and life will be easy

D. Life should give way to responsibility

单项选择题