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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
2017-01-09
61
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.
【C5】
选项
A、off
B、below
C、up
D、above
答案
A
解析
第1段开宗明义,全球变暖导致粮食减产。第2段第1句跟第3段第1句类似,均举例说明某些国家粮食减产。所以此处要选一个说明减产的词,所以选A项off,作副词时可表示“变少,变小”。
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0
考研英语一
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