选择性必修一 Unit 5如何写优缺点类议论文写作任务假定你是李华，在英语课上你们班同学就“转基因作物的利与弊”进行了讨论，请你根据讨论结果写一篇英语短文向校英文报投稿利弊你的观点1. 产量高，缓解粮食短缺问题；2. 农药使用少，生产成本低，价格便宜1. 可能对人体有害；2. 可能对环境造成威胁，破坏生态平衡，影响作物的多样性注意：1. 词数 120 左右； 2. 可以适当增加细节，以使行文连贯参考词汇：转基因作物 genetically modified crops写作指导一、审题定调本写作任务要求论述“转基因作物的利与弊”，是一篇阐述优缺点类型的议论文因此写作时要围绕“利”与“弊”进行阐述，阐述过程要做到层次分明、逻辑清晰时态以一般现在时为主二、谋篇布局本写作可分为三部分：第一部分：引出话题；第二部分：分层论述（利与弊）；第三部分：提出自己的观点三、常用表达★ 过渡性词汇：· firstly / first / first of all ...; secondly / second ...; lastly / last but not least ...· on the one hand ... on the other hand ...; for one thing ..., and for another ...; besides; in addition;moreover; furthermore; what’s more· all in all; in conclusion; in a word; in short; in brief; to sum up; to conclude; balancing theadvantages and the disadvantages; considering the pros and cons★ 表达个人观点：As for me, ...I would prefer to ...I firmly believe that ...I personally feel that ...I partly / fully agree that ...As far as I am concerned, ...I firmly support the view that ...In my opinion, ... is preferable to ...The advantages outweigh the disadvantages. 范文展示范文一In recent years, more and more genetically modified crops have entered the market and theyare popular with many consumers.Generally speaking, genetically modified crops have many advantages. First, geneticallymodified crops have higher yields than ordinary crops, thus partly alleviating the problem ofworldwide food shortages. Second, they require less pesticide use and production costs are lower.As a result, food prices are also lower.At the same time, they also have many disadvantages. For example, genetically modifiedcrops may be harmful to our health. Besides, they may affect biological diversity, break thebalance of nature and threaten the environment as well.As for me, I believe genetically modified crops could benefit human beings, if we do our bestto avoid their harmful effects.范文二These days more and more genetically modified crops have been appearing on supermarketshelves, which are favored by many consumers.On the one hand, genetically modified crops have many advantages compared withconventional crops. For one thing, genetically modified crops attain higher yields, which can helptackle the crisis of global food shortages to some extent. And for another, the combined effect offewer pesticides and lower production cost results in lower food prices overall.On the other hand, their disadvantages are also obvious. First, genetically modified cropsmay do harm to our health. What’s worse, they may pose a threat to the environment, affectingcrop variety and destroying the balance of nature.As far as I am concerned, genetically modified crops can be of benefit to human beings, aslong as we take care in their development and make them safe.拓展阅读：Vertical farms run by AI and robots语篇导读：创新的种植技术对于食物的可持续供应来说至关重要。
我们一起来看看垂直农场公司 Plenty 有什么独特之处吧!Plenty, an agricultural technology company in San Francisco, is reinventing farms andfarming. Nate Storey, the company’s chief science officer, says the future of farms will be verticaland indoors, so food can be grown anywhere in the world all the year round; and farms willemploy robots and artificial intelligence (AI) to improve the quality of growth for fruits andvegetables. 1. ____________________.As AI is on the rise, farmers on flat farms have been using new tools to make farming betteror easier. In recent years, they’ve been using drones ( 无 人 机 ) and robots to improve cropmaintenance. 2. ____________________, while a Plenty’s vertical farm can produce the samequantity of fruits and vegetables as a 720-acre flat farm, but on only 2 acres! Plenty’s climate-controlled indoor farm has rows of plants growing vertically, hung from theceiling. There are LED lights shining on them, robots moving them around, and AI managing allthe variables of water, temperature, and light. The conditions are so good that the yield per acre is400 times higher than that of an outdoor flat farm.Another advantage of vertical farming is that the fruits and vegetables are grown at awarehouse nearby instead of 1,000 miles away or more from a city. 3. ____________________,which can reduce millions of tons of yearly CO2 emissions (排放) and the price of fruits andvegetables will also go down. Imported fruits and vegetables are more expensive, so poor peoplein society are at an extreme nutritional disadvantage. Vertical farms could tackle this problem.Also, Plenty’s farms grow organic crops without using herbicides or pesticides. Theyrecycle all water used, even catching the evaporated (蒸发的) water in the air. The best farm inSan Francisco is using 100% renewable energy.Moreover, all the packaging is 100% recyclable, made of recycled plastic, and speciallydesigned to keep the food fresh longer to reduce food waste.Ideally, the company will bran。