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A new technique ______, the yields as a whole increased by 20 percent.
A new technique ______, the yields as a whole increased by 20 percent.
admin
2009-08-21
73
问题
A new technique ______, the yields as a whole increased by 20 percent.
选项
A、working out
B、having worked out
C、having been worked out
D、to have been worked out
答案
C
解析
本题考分词的独立结构作状语的用法。结合语态,故C项正确。本句大意为:新技术研究出来之后,整个产量增长了20%。
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