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As one of the most powerful brushes, zhx is required to give his juniors nn problems. zhx thinks the ithith problem's difficulty is ii. He wants to ar 阅读全文
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Each person had do something foolish along with his or her growth.But,when he or she did this that time,they could not predict that this thing is a mi 阅读全文
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A Star not a Tree? Luke wants to upgrade his home computer network from 10mbs to 100mbs. His existing network uses 10base2 (coaxial) cables that allow 阅读全文
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题目描述 在一个2维平面上有两条传送带，每一条传送带可以看成是一条线段。两条传送带分别为线段AB和线段CD。lxhgww在AB上的移动速度为P，在CD上的移动速度为Q，在平面上的移动速度R。现在lxhgww想从A点走到D点，他想知道最少需要走多长时间 在一个2维平面上有两条传送带，每一条传送带可以看 阅读全文