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A great deal of advanced science and technology has been ______ since China carried out the reform and opening policy.
A.brought downB.brought inC.brought outD.brought up
B
考查短语辨析,brought down 降低,brought in引入,brought out产生,brought up提出,句意:自从中国执行改革开放以来,许多先进的科学技术已经被引入了。故选B。
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