5月10日出版的《解放军报》刊发题为《亚丁湾,记者体验护航“十

 510日出版的《解放军报》刊发题为《亚丁湾,记者体验护航“十八般兵器”》的报道,首次曝光称,中国海军第五批护航编队的护航舰艇上,出现了一种神秘的声波武器——“金嗓子”,对索马里海盗构成了有效威慑。实际要阻挡这一武器的袭击,只要用薄薄的一层(     科网

A.半导体        B.磁性物质        C.真空带    D.金属物质

                             

答案

C

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