人体中蕴含着许多物理知识,以下说法错误的是( ) A.手臂、腿等部位可看成杠杆 发布时间:2017-06-09 18:40 │ 来源:www.tikuol.com 题型:选择题 问题: 人体中蕴含着许多物理知识,以下说法错误的是( )A.手臂、腿等部位可看成杠杆B.手掌上的纹路可以减小摩擦C.人运动时流汗利用了汗液的蒸发吸热来降温D.较尖的犬牙可以增大对食物的压强
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题型:选择题 —Would you like to ____ on the performances of my students? —Sorry, but I am not in the position to do so. [ ]A. have comment on B. make a comment on C. say some comment about D. raise a comment on 查看答案