下列哪组单位是国际单位制中的基本单位?(   )   A.千克、秒、

下列哪组单位是国际单位制中的基本单位?(    )

   A.千克、秒、牛顿   B.千克、米、秒  C.克、千米、秒    D.牛顿、克、米

 

答案

B

解析:略

 

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