123. At present nanotechnology(纳米技术), a kind of tip science_________to the common people. Few people

题目简介

123. At present nanotechnology(纳米技术), a kind of tip science_________to the common people. Few people

题目详情


123. At present nanotechnology(纳米技术), a kind of tip science_________to the common people. Few people know him.
A.unknowingB.unknownC.knownD.Untrue
题型:单选题难度:偏易来源:不详

答案

B

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