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Global warming is already cutting substantially into potential crop yields in some countries—to such an extent that it may be a
Global warming is already cutting substantially into potential crop yields in some countries—to such an extent that it may be a
admin
2015-03-26
63
问题
Global warming is already cutting substantially into potential crop yields in some countries—to such an extent that it may be a factor in the food price【C1】______ that have caused worldwide stress in recent years, researchers suggest in a new study.
Wheat yields in recent years were down by more than 10 percent in Russia and by a few percentage points【C2】______ in India, France and China compared with【C3】______ they probably would have been without rising【C4】______, according to the study.
Corn yields were【C5】______ a few percentage points in China, Brazil and France from what would have been【C6】______, said the researchers, whose findings were published in Friday’s【C7】______ of the journal Science.
Some countries saw small gains from the temperature increases, however. And in all countries, the【C8】______ carbon dioxide that humans are【C9】______ into the air acted as a【C10】______ that encouraged plant growth,【C11】______ some of the losses from rising temperatures caused by that same greenhouse gas.
【C12】______, the study’s authors found that when the gains in some countries were weighed【C13】______ the losses in other countries, the overall global【C14】______ of climate change has been small so far: losses of a few percentage points for wheat and corn from what they would have been【C15】______ climate change. The general impact on production of rice and soybeans was【C16】______, with gains in some regions entirely counterbalancing losses in others.
【C17】______ the authors of the study pointed out that temperature increases were expected to【C18】______ in coming decades, making it likely that the challenges【C19】______ food production will grow in a era when demand is expected to【C20】_____ sharply.
【C17】
选项
A、So
B、Hence
C、But
D、And
答案
C
解析
句意关系题。根据这句话后半部分的提示,粮食生产可能会受到越来越大的挑战,与前文得出的影响不大的结论相反,故选but。
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0
专业英语四级
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《马氏文通》是马建忠参照()语法体系,同时参照中国关于虚字的一些说法,经过长期的整理、搜集而创建起来的一套汉语语法体系。(西南大学2010翻译硕士)
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