判断题
发布日期:2021-03-22
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弹簧刚度是载荷增量dF与变形增量dλ之比,即产生单位变形所需的载荷,弹簧的刚度计算公式为F'=dF/dλ。特性线为渐增型的弹簧,刚度随着载荷的增加而增大; 而渐减型的弹簧,刚度随着载荷的增加而减少。至于直线型的弹簧,刚度则不随载荷变化而变化,即F'=dF/dλ=F/λ=常数。因此,对于具有直线型特性线的弹簧,其刚度也成为弹簧常数。
不一致是一种因在论辩中提出或接受一组不一致的论点而引起的谬误。所谓不一致,指在一组论点中,某论点与其他论点在逻辑上相互冲突。
构架,读音gòu jià,汉语词语,意思是结架材木;指建筑。
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Cloze 9 There was a king who had twelve beautiful daughters. They 1 in twelve beds all in one room and when they went to bed, the 2 were shut and locked up. However, every morning 3 shoes were found to be quite worn through as if they had been danced in all night. Nobody could make out how it happened, or 4 the princesses had been. So the king made it 5 to all that if any person could discover the 6 and find out where it was that the princesses danced in the night, he would have the 7 he liked best to take as his wife, and would be king 8 his death. But whoever tried and did not succeed, after three days and nights, would be 9 to death. A prince from a nearby country soon came. He was well entertained, and in the evening was taken to the chamber (大房间) next 10 the one where the princesses lay in their twelve 11 . There he was to sit and watch where they went to dance; and, in order 12 nothing could happen without him hearing it, the door of his 13 was left open. But the prince soon went to sleep; and when he 14 in the morning he found that the princesses had all been dancing, 15 the soles of their shoes were full of holes.
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