◎ 题干
As a result of the use of the new technology,the production of this product________50 percent.
[     ]
A.has risen to  
B.has been raised to
C.has risen by  
D.has been risen by
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“As a result of the use of the new technology,the production of this product________50 percent.[ ]A.has risen toB.has been raised toC.has risen byD.has been ris…”主要考查了你对  【介词和介词短语】【现在完成时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。