2024年3月16日发(作者：)

2019版高考英语阅读理解一轮练题（8）

李仕才

A

Nowadays more and more people are talking about genetically modified

foods ( GM foods). GM foods develop from genetically modified organisms (有机

体), which have had specific changes introduced into their DNA by genetic

engineering techniques. These techniques are much more precise where an

organism is exposed to chemicals to create a nonspecific but stable change. For

many people, the hightech production raises all kinds of environmental, ethical,

health and safety problems. Particularly in countries with long farming traditions,

the idea seems against nature.

In fact, GM foods are already very much a part of our lives. They were first

put on the market in 1996. A third of the corn and more than half the cotton grown

in the U. S. last year was the product of biotechnology, according to the

Department of Agriculture. More than 65 million acres of genetically modified

crops will be planted in the US this year. The genetic genie is out of the bottle.

However, like any new product entering the food chain, GM foods must be

subjected to careful testing. In wealthy countries, the debate about biotech is not

so fierce by the fact that they have a large number of foods to choose from, and a

supply that goes beyond the needs. In developing countries desperate to feed

fastgrowing and underfed populations, the matter is simpler and much more

urgent: do the benefits of biotech outweigh the risks?

The statistics on population growth and hunger are disturbing. Last year the

world's population reached 6 billion. The UN states that nearly 800 million people

around the world are unhealthy. About 400 million women of childbearing age

don' t have enough iron, which means their babies are exposed to various birth

many as 100 million children suffer from vitamin A deficiency, a

leading cause of blindness.

How can biotech help? Genetic engineering is widely used to produce plants

and animals with better nutritional values. Biotechnologists have developed

genetically modified rice and they are working on other kinds of nutritionally

improved crops. Biotech can also improve farming productivity in places where

food shortages are caused by crop damage attributable to drought, poor soil and

crop viruses.

passage mainly talks about________.

A. the world's food problem

shortages

ing to the passage, GM foods________.

A. will replace naturally grown foods

B. are far better than naturally grown foods

C. may help to solve the problem of poor nutrition

D. can cause serious trouble in developing countries

underlined sentence “The genetic genie is out of the bottle.” in Paragraph

2 probably

means that________.

foods are available everywhere

B. the technology in producing GM foods is advanced

C. genetic technology may have uncontrollable powers

D. genetic technology has come out of laboratories into markets

's the writer's attitude towards GM foods?

A. Enthusiastic.

B. Cautious.

C. Disapproving. D. Unbelievable.

B. the development in biotech

C. the genetically modified foods D. the way to solve food

【文章大意】本文是一篇说明文，主要介绍了转基因食品及其对人类生活的

影响。

1.C 【解析】主旨大意题。根据文章内容，特别是第一段中的“Nowadays more and

more people are talking about genetically modified foods ( GM foods).”可知，

本文主要介绍的是转基因食品。

2.C 【解析】细节理解题。根据最后一段中的“Genetic engineering is widely used

to produce plants and animals with better nutritional values.”可知，转基

因食品有助于解决营养不良问题。

4.B 【解析】观点态度题。根据第三段中的“However, like any new product entering