《2019高考英语一轮基础练 unit 23 conflict（含解析）北师大版选修8》由会员分享，可在线阅读，更多相关《2019高考英语一轮基础练 unit 23 conflict（含解析）北师大版选修8（11页珍藏版）》请在金锄头文库上搜索。
1、Unit 23 Conflict李仕才 阅读理解ANowadays 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 pre
2、cise 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
3、 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
4、 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 t
5、o 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 t
6、he worlds 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 defeats.As many as 100 million children suffer from vitamin A
7、 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
8、also improve farming productivity in places where food shortages are caused by crop damage attributable to drought, poor soil and crop viruses.1.The passage mainly talks about_.A. the worlds food problemB. the development in biotechC. the genetically modified foods D. the way to solve food shortages
9、2.According to the passage, GM foods_.A. will replace naturally grown foodsB. are far better than naturally grown foodsC. may help to solve the problem of poor nutritionD. can cause serious trouble in developing countries3.The underlined sentence “The genetic genie is out of the bottle.” in Paragrap
10、h 2 probablymeans that_.A.GM foods are available everywhereB. the technology in producing GM foods is advancedC. genetic technology may have uncontrollable powersD. genetic technology has come out of laboratories into markets4.Whats the writers attitude towards GM foods?A. Enthusiastic.B. Cautious.C
11、. Disapproving.D. Unbelievable.【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 bette
12、r 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 the food chain, GM foods must be subjected to careful testing.”可知，作者认为转基因食品进入市场前需要严格的检测，由此可见作者对转基因食品的态度是谨慎的。B(2017湖北八校高三第一次联考)We do not usually think about how our language works.Talking is such a
13、natural, everyday activity that we do not often stop to consider how it actually works.When we do study our language, though, we are often surprised that we are able to understand our conversations.Words can mean so many different things.However, it turns out that the speaking situation helps a lot
14、in making language work.First, the speaking situation helps make words more particular.For example, the word “dog” can describe a dog that a speaker saw in a dream.It can also be used to discuss a neighbors dog.No language has a separate word for the idea “dog that I saw yesterday” and another word
15、for the idea “dog that I saw in a dream”This is because the speaking situation makes it clear what speakers mean when they use words.So, when you have a conversation with your neighbor, the knowledge that you have a dog tells your neighbor what the word “dog” probably means in that situation.The spe
16、aking situation also helps make language clearer.For example, the word “bank” has two possible meanings.It can mean “a place where people keep money”，but it can also mean “the side of a river”So the sentence “I went to the bank” is not clear.It could mean I went to the side of the river or it could mean I went to the place where my money is kept.However, if the speake
