在各类英语考题中,阅读理解始终是中国考生感到头疼的一大模块，又因阅读理解在各类考题中的占比之高。对于这样的瓶颈我们真的束手无策了么?不会的，方法是一定存在的，但如果想找到方法，就必须付出精力去寻找正确的打开方式。今天文都四六级为大家分享2020年6月大学英语四级阅读理解：转基因食品安全吗，希望对您有所帮助。
大学英语四级阅读理解：转基因食品安全吗
Is GM Food Safe To Eat ?
Traditional plant breeding involves crossing varieties of the same species in ways they could cross naturally. For example, disease-resistant varieties of wheat have been crossed with high-yield wheat to combine these properties. This type of natural gene exchange is safe and fairly predictable.
Genetic engineering ( GE) involves exchanging genes between unrelated species that cannot naturally exchange genes with each other. GE can involve the exchange of genes between vastly different species — e.g. putting scorpion toxin genes into maize or fish antifreeze genes into tomatoes. It is possible that a scorpion toxin gene, even when it is in maize DNA1, will still get the organism to produce scorpion toxin — but what other effects may it have in this alien environment? We are already seeing this problem — adding human growth hormone genes to pigs certainly makes them grow — but it also gives them arthritis and makes them cross-eyed, which was entirely unpredictable.
It will be obvious, for example, that the gene for human intelligence will not have the same effect if inserted into cabbage DNA as it had in human DNA— but what side-effect would it have? In other words, is GM food2 safe to eat? The answer is that nobody knows because long-term tests have not been carried out.
Companies wanting a GM product approved in the UK or USA are required to provide regulatory bodies with results of their own safety tests. Monsanto’s3 soya beans were apparently fed to fish for 10 weeks before being approved. There was no requirement for independent testing, for long-term testing, for testing on humans or testing for specific dangers to children or allergic4 people.
The current position of the UK Government is that"There is no evidence of long-term dangers from GM foods."In the US, the American Food and Drug Administration5 is currently being prosecuted for covering up research that suggested possible risks from GM foods.
四级阅读理解练习题：
Ⅰ. Match the words with their Chinese quivalents:
1. disease-resistant A. 掩盖( 真相)
2. side-effect B. 高产的
3. long-term dangers C. 长期危害
4. cover up D. 副作用
5. high-yield E. 抗病的
Ⅱ. Question:
What do companies wanting a GM product approved in the UK or USA do?
四级阅读理解答案：
Ⅰ. 1. E 2. D 3 . C 4. A 5 . B
Ⅱ. They are required to provide regulatory bodies with results of their own safety tests.
以上就是文都四六级英语老师为大家整理的2020年6月大学英语四级阅读理解，希望大家都能够顺利通过此次的四级考试!
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