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(课外选材) According to experts, the advantage of modified food is that it helps in preventing the occurrence of allergies and also has a long shelf life. However, a major portion of the population is against the consumption of genetically modified food and is concerned about its disadvantages. If you are also confused about the consumption of genetically modified food, read through the pros and cons given below and decide for yourself. ADVANTAGES OF GENETICALLY MODIFIED FOODS ●One of the most prominent advantages of genetically modified food is that it helps in controlling the occurrence of certain diseases. Certain foods cause allergy to people. Their genetic modification alters the DNA system of these foods, thereby making them non-allergic. ●Another major advantage of such type of foods is that they grow faster than their traditionally grown counterparts. As a result, there is greater productivity and more food. ●A person need not bother about any additional costs, such as buying chemicals and pesticides, when it comes to genetically engineered food. The food is naturally pest-resistant. ●Farming these foods can be a great way to fight world hunger. Since these crops grow faster or more effectively, increased production would help countries wherein crops may not normally prosper because of less than desirable environmental conditions. ●The increased shelf life of these food products helps in reducing the quantity of rotten food. DISADVANTAGES OF GENETICALLY MODIFIED FOODS ●The biggest disadvantage of genetically modified food is that they have harmful effects on the human body. The consumption of these genetically engineered foods can lead to development of diseases that are immune to antibiotics. ●Chances of developing cancer are high in people who regularly consume engineered food. ●Since it is an unnatural way of producing foods, there is an increased health hazard such as allergens, transfer of antibiotic resistance markers and unknown effects. ●Since the production of engineered food involves infusing animal genes in the crops and tampering with nature, it might not be good for consumption in the long run. 1. How does genetically modified food control the occurrence of certain diseases?{A; B; C} A. By cross-pollinating. B. By conventional crossbreeding. C. By altering the DNA system of these foods. 2. Do farmers need to buy any chemicals and pesticides if they plant genetically modified food?{A; B; C} A. Yes, they need to. Because the food is not resist to pests. B. No, they don’t need to. Because the food is naturally pest-resistant. C. No, they don’t need to. Because the chemicals and pesticides are provided by the government. 3. Which statement is not the advantage of genetically modified food?{A; B; C} A. It may have harmful effects on human body. B. Genetically modified food grows faster than their traditionally grown counterparts. C. Farming genetically modified food can help fight world hunger. 4. What would happen to a person if he regularly consume genetically modified food?{A; B; C} A. He would get cold. B. He would lose some weight. C. He would have cancer. 5. Which title is the best for this passage?{A; B; C} A. Can genetically modified foods combat world hunger? B. Genetically modified mood: our answer is no C. Genetically modified foods: pros and cons
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【多选题】影响滑坡形成的主要因素有( )
A.
岩石类型
B.
斜坡几何形态
C.
冰的活动和人为因素
D.
斜坡上部荷载
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A.
7.3.
B.
38.5
C.
40.25
D.
80.3
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A.
是一类以铁卟啉为辅基的
B.
都紧密结合在线粒体内膜上
C.
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D.
在呼吸链中按 Cytb-cytc-cytC1 - cytaa排列
E.
又称为细胞色素氧化酶
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A.
岩石类型
B.
斜坡几何形态
C.
水的活动和人为因素
D.
斜坡上部荷载
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A.
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B.
土坡的几何条件;水对土体的润滑和膨胀作用、雨水和河流的冲刷和侵蚀作用
C.
震动液化现象;土坡下部开挖造成的平衡失调
D.
土坡所在山体的海拔高度
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A.
滑坡分类的重要依据
B.
影响滑坡稳定性的主要因素
C.
滑坡的形成条件
D.
滑坡的主要判别持征
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