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考研
Adopting this method, the team raised the average yield______40%.
Adopting this method, the team raised the average yield______40%.
admin
2013-03-25
33
问题
Adopting this method, the team raised the average yield______40%.
选项
A、at
B、by
C、to
D、with
答案
B
解析
raise the yield by 40%“将产量提高了百分之四十”,这是增加或减少多少的倍数表达法。如果要表达的是纯增加或减少的具体数,就用介词by表示(有时by可以省 略)。如:raise the price by 10%;The price of tea has risen by five pence;Party member-ship has increased by 4000;Butter lose five cents in prices.如果纯增加或减少的量刚好是整倍数时就不需用介词by,如:Foreign investments increased six times.如果要表示“增加到或减少到……”时需用介词to;如要表示“(从……)增加到(或减少到)……”时,要用(from…)to,如:The price of tea has risen(from 20 pence)to 30 pence.
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考研英语一
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