阿基米得说:“如果给我一个支点,我就能撬起整个地球。”这句话

阿基米得说:“如果给我一个支点,我就能撬起整个地球。”这句话不但显示了科学的伟大力量,而且精辟地阐明了他在物理学方面的一大贡献,即提出了(   

A.万有引力定律           B.杠杆原理          C.狭义相对论            D.浮力定律

答案

B

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