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2025-01-10 08:22 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 ortant crop， but viruses(病毒 )can dramatically destroy its output by up to 80%.The Kenya Agricultural Research Institute， however， has developed a geically modified sweet potato that can increase crop production by 18－ 25%.What39。s more， this new kind of potato has genes that resist damage due to bad climate or unexpected natural disasters. The use of geically modified foods can have a positive effect on the economy， especially in less developed crops have already led to economic growth in South Africa，according to some GM crops require fewer chemicals， farmers can save money on both the costs of pesticides and labor necessary to manage the ， bined with higher output， allow the farmer to gain more from the product. With an increasing adoption of GM crops, the use of pest control chemicals has been greatly fact， while not necessarily related to food related biotechnology， some GM plants have been developed to take care of heavy metal pollution in some polluted soil. Finally，biotechnology can allow people to receive vaccines (疫苗 )that are difficult to putting vaccines into food products， anizations can more easily transport them to people in need. 1． We can learn from the text that ________. A． GM crops benefit the environment B． farmers fail to grow a lot of plants C． insect pests do less harm to the soil D． more greenhouse gas is sent into the air 2． What can we infer from the example of the sweet potato? A． Kenya will have the most advanced technology in the future. B． Crops can be modified to grow in worse natural environment. C． Potatoes grown in wet areas can resist different kinds of insects. D． The adoption of GM potatoes may do harm to the farmers39。 health. 3． Which of the following can be concluded from the text? A． New challenges in world farming have been caused.
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