问题 单项选择题

阅读下面文字,回答问题。

  吃鱼为什么使人聪明呢这是高不饱和脂肪酸的作用。鱼的DHA含量高,特别是鱼头、鱼眼中的DHA高达40%~70%。DHA对神经细胞,特别是轴突的生长、网络的形成极其有益,因此对健脑益智有明显作用。据专家研究报告,婴儿在出生后不久脑细胞即达140亿个。此后无论脑细胞的数量及体积都不再增加。这些突起在脑神经间形成细密的网膜。而这些网膜主要由脂肪构成。人脑的脂肪占脑的60%,这就是鱼油、核桃、芝麻的不饱和脂肪酸健脑益智的道理。大脑与身体其他器官相比有共性,也有自己的特点。谈共性,即它需要各种营养素,除了高不饱和脂肪酸外也需要蛋白质、矿物质、微量元素。但它需要的脂肪酸不足,则影响智力的 __________ ,不能从儿童的大脑转变为成人的大脑,其智力将停留在儿童的阶段。所以泡饭加咸菜的早餐既不能满足儿童对热量的需求,也不能满足儿童长身体的要求,更不能满足儿童发展智力的要求。

泡饭加咸菜不能满足儿童发展智力的要求,其主要因素是()

A.缺乏蛋白质

B.缺乏矿物质和微量元素

C.缺乏必需的脂肪酸

D.缺乏身体发育所必需的物质

答案

参考答案:C

阅读理解

阅读理解。

     When did you last visit a shopping mall? In many places, the answer would be "last weekend." Some

people go even more often. Why? For one thing, malls offer goods and services that people need all in one

place: food, clothing, things for their houses, entertainment, even medical services. So, are malls one of the

highlights of modern civilization? Environmental activists would say No! They would go even further and

say that consumer behavior is causing a huge environmental disaster. They cause consumers of ignorance

of the side effect of their shopping-urban sprawl (扩大).

     Social scientists agree that patterns of development have changed the landscape a great deal in the last

half century. Prior to 1950, most people lived in towns or cities and either walked to work or took public

transportation. Only very wealthy people had automobiles. Farmers lived in rural areas or isolated villages

and came into town only when they needed things they couldn't produce themselves. If you gazed at the

landscape you would see towns surrounded by countryside. Then a massive change occurred.

     Automobiles became affordable and people were quick to adopt them. Now ambitious workers could live

in the suburbs, the areas just outside cities, which started to grow rapidly. As long as there was lots of cheap

land in the suburbs, no one paid much attention to the usage of that land. Malls, fast food restaurants, cinemas,

and car dealerships spread out in large, flat buildings. These one-storey buildings and their parking lot took up

a great deal space. Well-meaning farmers thought they were better off selling their land than growing crops.

In ignorance, no one realized that once the land was built up in urban sprawl, the good farming land would

be ruined forever. There was no way to preserve it.

     Only in recent years have people come to mourn the old way of life as they have developed insight into the

problems of unconditional grows. Now people realize that urban sprawl has come with serious environmental

problems. The negative aspects of sprawl include air and water pollution, loss of agricultural land, traffic jams,

and the death of businesses in the old town centers. Many scholars think the time has come to analyze the

problems better so we can develop appropriate policies to control further sprawl. Some think the best way to

do is to educate citizens about their priceless environment.

1. What is mainly discussed in the passage?

A. Weekend Fun.

B. Urban Sprawl.

C. New Automobiles.

D. Isolated Villages.

2. What does the underlined word "They" refer to in the first paragraph?

A. Malls.

B. Activists.

C. Farmers.

D. Scientists.

3. Who do activists blame for environmental problems?

A. Endangered animals.

B. Shopping mall owners.

C. Unthinking shoppers.

D. Ambitious farmers.

4. What do scholars think should be done about urban sprawl?

A. Understand the situations better.

B. Follow customary policies.

C. Start school in shopping mails.

D. Charge polluters a lot of money.

5. What is the scholars' attitude toward urban sprawl?

A. Respectful.

B. Disapproving.

C. Pessimistic.

D. Doubtful.

单项选择题