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Global warming is already cutting substantially into potential crop yields i
Global warming is already cutting substantially into potential crop yields i
游客
2023-11-09
38
管理
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. [br] (6)
选项
A、assumed
B、thought
C、guessed
D、expected
答案
D
解析
语义线索题。根据第一段第一句话的提示,粮食产量低于预期,而第三段第一句话是其中一个例证,所以此处要填一个过去分词,表示预期产量,故选expected“预料,预计,期待”。assumed“假定,假设”和guessed“猜测”可排除,因为人们对于玉米产量应该是进行预估,而不是进行假设或猜测。thought“思考,想”,不符合句意。
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