试题与答案

交通渡口的主管部门、乡镇渡口所在地的乡镇人民政府、内部渡口的办渡单位,对渡口的安全负

题型:判断题

题目:

交通渡口的主管部门、乡镇渡口所在地的乡镇人民政府、内部渡口的办渡单位,对渡口的安全负直接领导和管理责任。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:解:设油压为P,拔管阻力为F,油缸截面积为S,则:F=2×S×P=2×π*(0.5×d)2×P=2×3.1416×(0.5×0.1)2×10×106=0.157×106(N)=157(kN)。这时的拔管阻力为157kN。

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