19.When you buy cooking oil in the supermarket,you may notice that some brands are labeled as"GM (genetically modified 轉(zhuǎn)基因)-free".So,what is genetic modification?Are GM foods safe?
These questions have been put back into the public attention recently.On Nov 19,the Food and Drug Administration (FDA) in the US announced that it had approved the AquAdvantage salmon to go on the market,making it the first GM animal to be approved as food anywhere in the world.
GM foods are plants or animals that have been given a gene from another plant or animal to make them stronger in some way.The AquAdvantage salmon contains a gene from another type of salmon that makes it grow faster.
Although the FDA has said"food from the fish is safe to eat",some believe that scientists can't completely understand the potential health risks of GM foods,simply because they're so new.Others worry that the fish could escape into the wild and cause ecological problems.
GM crops have experienced the same public argument,even though GM technology cuts down on the use of pesticides(殺蟲劑) on crops and increases output.
While GM animals are new,GM crops have already appeared on our plates:A total of 28countries in the world including the US,Brazil and India planted 181.5million hectares (1.815million km2)of GM crops in 2014,according to the International Service for the Acquisition of Agri-biotech Applications.In China,we grow GM cotton and papaya and import GM soybeans,corn,rape,cotton and beets from abroad.
Due to safety worries,many countries have regulations for producing and selling GM foods.
In European Union countries,each GM food must be approved before it can be used.This process can take up to 17months.The origin of all GM foods must also be traceable,and all food with a GM content of more than 0.9percent must also be labeled,according to EU website europaeu.
The US is less strict about GM foods.According to FDA regulations,companies introducing new GM foods to the market should report them at least 120days before release.The labeling is voluntary,except that a product cannot be labeled as"GM-free"if genetically modified materials are used.
In China,GM foods can only be produced after strict tests by the Ministry of Agriculture and it's sure that they are safe.All food that is made from GM crops or contains GM ingredients must be clearly labeled on the wrapper.
32.According to the text,the AquAdvantage salmonC.
A.tastes better than normal salmon
B.is a product that mixes several types of fish
C.has a gene from a different type of salmon
D.remains to be approved in several countries
33.One of the reasons for many people to worry about the AquAdvantage salmon is thatB.
A.the gene that makes them grow faster can work on humans too
B.there are possible health risks that even scientists might not have figured out yet
C.they could possibly become threats to other wild species
D.they are not nutritious enough or might taste strange
34.From the text,it can be concluded that GM cropsB.
A.no longer cause any public argument
B.have already been planted in some countries
C.a(chǎn)re popular because they don't need pesticides
D.can increase output,making them welcome in countries like Japan
35.Which of the following is TRUE about regulations for producing and selling GM food?D
A.All food with GM content must be labeled in European countries.
B.In the US,the AquAdvantage salmon will have to be labeled as GM food.
C.In France or Germany,every GM food that is about to go on the market must be reported at least 120days before release.
D.In China,all food that is made from GM crops or contains GM ingredients must be clearly labeled on the package.
分析 本文介紹關(guān)于轉(zhuǎn)基因食物的一些情況.
解答 32.C,細(xì)節(jié)理解題,根據(jù)第三段第二句The AquAdvantage salmon contains a gene from another type of salmon that makes it grow faster.可知,The AquAdvantage salmon 包含了一種能使它生長(zhǎng)更快的基因類型,故答案為C.
33.B,細(xì)節(jié)理解題,根據(jù)第四段中some believe that scientists can't completely understand the potential health risks of GM foods,simply because they're so new,一些人認(rèn)為科學(xué)家還不能完全明白基因食品中潛在的健康冒險(xiǎn),只是因?yàn)樗鼈兪侨绱诵碌臇|西,故答案為B.
34.B,推理判斷題,根據(jù)第八段第一句In European Union countries,each GM food must be approved before it can be used.歐洲很多國(guó)家,每一種轉(zhuǎn)基因食品必須在使用前得到批準(zhǔn),The US is less strict about GM foods美國(guó)對(duì)轉(zhuǎn)基因食品的要求不太嚴(yán)格,In China,GM foods can only be produced after strict tests by the Ministry of Agriculture and it's sure that they are safe在中國(guó),基因食品在農(nóng)業(yè)部嚴(yán)格確保安全后才可以生產(chǎn),故答案為B.
35.D,細(xì)節(jié)理解題,根據(jù)最后一句All food that is made from GM crops or contains GM ingredients must be clearly labeled on the wrapper.所有由轉(zhuǎn)基因作物制成的或含有轉(zhuǎn)基因成分的食品一定要清晰地包裝上標(biāo)簽,故答案為D.
點(diǎn)評(píng) 解答任務(wù)型閱讀理解題,首先對(duì)原文材料迅速瀏覽,掌握全文的主旨大意.因?yàn)殚喿x理解題一般沒有標(biāo)題,所以,速讀全文,抓住中心主旨很有必要,在速讀的過程中,應(yīng)盡可能多地捕獲信息材料.其次,細(xì)讀題材,各個(gè)擊破.掌握全文的大意之后,細(xì)細(xì)閱讀每篇材料后的問題,弄清每題要求后,帶著問題,再回到原文中去尋找、捕獲有關(guān)信息.最后,要善于抓住每段的主題句,閱讀時(shí),要有較強(qiáng)的針對(duì)性.對(duì)于捕獲到的信息,要做認(rèn)真分析,仔細(xì)推敲,理解透徹,只有這樣,針對(duì)題目要求,才能做到穩(wěn)、準(zhǔn).