题目内容
y=f(x)满足拉格朗日中值定理，必须同时满足以下三个条件，分别是：（1）y=f(x)在[a,b]上连续，（2）y=f(x)在（a,b）上可导，（3）y=f(x)满足f(a)=f(b).
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Translate the paragraph below into Chinese.Some reflection about the material culture of prehistoric and preindustrial peoples may help to show what I mean. A single visit to a museum which displays artifacts used by simple preindustrial societies is sufficient to dispel the notion that quality is dependent on technology. Artifacts may be of simple, even primitive design, and yet be built to serve their intended purpose in a reliable manner during a lifetime of use. We acknowledge this when we honor the label “handmade” and pay extra for the jewelry, sweaters, and handbags turned out by the dwindling breeds of modern-day craftspeople.
若将受扭实心圆轴的直径增加一倍,则其刚度是原来的( )。
在单元体两个相互垂直的截面上,切应力的大小可以相等,也可以不同。()
受扭转的圆轴,最大切应力只出现在横截面上。( )
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