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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
2013-12-13
56
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 (1)______ 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 (2)______ in India, France and China compared with(3)______ they probably would have been without rising(4)______, according to the study.
Corn yields were(5)______ a few percentage points in China, Brazil and France from what would have been (6)______, said the researchers, whose findings were published in Friday’s (7)______ of the journal Science.
Some countries saw small gains from the temperature increases, however. And in all countries, the(8)______ carbon dioxide that humans are (9)______ into the air acted as a (10)______ that encouraged plant growth,(11)______ some of the losses from rising temperatures caused by that same greenhouse gas.
(12)______, the study’s authors found that when the gains in some countries were weighed(13)______ the losses in other countries, the overall global(14)______ of climate change has been small so far: losses of a few percentage points for wheat and corn from what they would have been (15)______ climate change. The general impact on production of rice and soybeans was(16)______, with gains in some regions entirely counterbalancing losses in others.
(17)______ the authors of the study pointed out that temperature increases were expected to(18)______ in coming decades, making it likely that the challenges(19)______ food production will grow in a era when demand is expected to(20)_____ sharply.
(19)
选项
A、to
B、of
C、from
D、for
答案
A
解析
短语搭配题。此处需要在challenges“挑战”后面填一个介词,说明未来几十年粮食生产受到的挑战会加大,因此选A项,challenge to“对某人或某事的挑战”。challenge of和challenge from均表示“来自某人/某事物的挑战”,与句意刚好相反。challenge for是指为了获得某事物而进行的挑战,也与句意不符。
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0
专业英语四级
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