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共用题干 第一篇Is Global Warming Good for Farm

恬恬2019-12-17  17
问题 共用题干第一篇

Is Global Warming Good for Farming?

You might think a little global warming is good for farming. Longer,warmer growing seasons
and more carbon dioxide(CO<sub>2</sub>）一what plant wouldn't love that?The agricultural industry basically agrees on that. But global warming's effects on agriculture would actually be quite complicated一and mostly not for the better.
It's true that some crops will prosper on a warmer planet,but the key word there is"some."According to a government report,higher CO<sub>2</sub> levels and longer growing seasons will increase yields for fruit growers in the Great Lakes region.But many major American crops already use CO<sub>2</sub> so efficiently that more of it probably won't make much difference to them.
What will make a difference are all the other things we'll have more or as temperatures rise一namely droughts（干旱）,bugs and big storms. More droughts mean lower crop yields. Melting snow in the Western US will increase water availability in spring but decrease it in summer,forcing farmers to change cropping practices.As insects that eat crops adapt their migration patterns to our warmer climate,farmers will have to either use more insecticide or plant hardier crops.
Farmers on both coasts are already starting to reap some of what the nation's fossil-fuel addiction has sown.Crops in those regions require a certain number of colder days or"winter chill"before they break dormancy（冬眠）and begin flowering. Too few cold days breaks the plants' flowering schedule which in turn affects pollination（授粉）and hurts yield.
So,given how much is at stake for them,how are farm states working to shape climate legislation?In response to agricultural demands,the Waxman-Markey bill frees the agricultural industry from CO<sub>2</sub> emission limits and gives up control over what activities guarantee carbon offset credit to the Agricultural Department.
Some farmers一and some farm state congressional leaders一have argued that because plants convert CO<sub>2</sub> into oxygen,agricultural lands store more CO<sub>2</sub> than they emit. This is only theoretically true.What we can say with certainty is that,like most big industries,farming is fossil-fuel intensive一large quantities of CO<sub>2</sub> are emitted from farm equipment such as irrigation pumps and tractors.
选项 Under the influence of global warming the yields of American crops will_______.A:be greatly enhancedB:be certainly reducedC:still remain stableD:be hard to predict
答案D
解析本题是细节考查题。题干是：在全球变暖的影响下，美国粮食产量会如何？选D的依据是第一段最后一句：" But global warming's effects on a幼culture would actually be quite complicated一and mostly not for the better.”但是，全球变暖对农业的影响实际上是相当复杂的―并且大多数的影响都不会促进农业生产。选项D是说在全球变暖的影响下，美国粮食产量会很难预测，与原文意思一致。 本题是细节考查题。题干是：第三段最后一行的“hardier crops”指的是何种作物？选B的依据是第三段最后一句：" As insects that eat crops adapt their migration patterns to our warmer climate , farmers will have to either use more insecticide or plant hardier crops.”由于吃农作物的昆虫会改变其迁徒模式以适应变暖的气候，农民将不得不使用更多的杀虫剂或种植抗虫害能力更强的农作物。选项B的意思是对虫子有抵抗力的作物，与原文意思相符。 本题是细节考查题。题干是：美国东西两岸过度使用化石燃料的结果是什么？选A的依据是第四段最后一句：" Too few cold days breaks the plants' flowering schedule which in turn affects pollination（授粉）and hurts yield.”寒冷的日子太少会打乱这些作物的开花周期，进而影响作物的授粉和产量。选项A的意思由于冬季寒冷时间的缩短，作物的产量降低了，与原文意思相符。 本题是细节考查题。题干是：根据《瓦克斯曼?马基法案》，农业产业怎样？选B的依据是第五段的第二句：" In response to a护cultural demands , the Waxman-Markey bill frees the a护cultural industry from CO2 emission limits and gives up control over what activities guarantee carbon offset credit to the A幼cultural Department.”在应对农业需求方面，《瓦克斯曼·马基法案》使农业不受二氧化碳减排计划的约束，并且将如何才能保证有效的碳补偿的控制权交给了农业部。选项D的意思是根据《瓦克斯曼·马基法案》，农业产业可以产出多少二氧化碳量就排放多少，与原文相符。 本题是细节考查题。题干是：作者最有可能认同的有关农业产业的说法是哪个？选D的依据是最后一段最后一句：" What we can say with certainty is that , like most big industries,farming is fossil-fuel intensive一large quantities of CO<sub>2</sub> are emitted from farm equipment such as irrigation pumps and tractors.”但我们能确定地说的是，与大多数大型产业一样，农业也是化石燃料密集型产业―灌溉水泵、拖拉机等农业设备往往会排放出大量的二氧化碳。选项D的意思是农业产业消耗很多化石燃料，与原文相符。后一句的wouldn't be surprise…均表明，与20世纪70年代的情况不同，现在实行4天工作制的可能性非常大。选项C的意思是4天工作制很有可能普及，与原文相符。
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