典范英语少儿英语拼读教程(Floppy’s Phonics) BOOK1，11-14课。

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WIFI对人究竟有没有危害？

    　　<br><br>　　其实这个问题可以分成2个小问：<br><br>　　1、辐射对人体健康有没有危害？<br><br>　　2、Wi-Fi辐射对人体健康有没有危害？<br><br>　　分开来看的话，答案就很明确了。这里我们并不想将“Wi-Fi产生的辐射强度不足以影响人体健康”的老俗套搬出来，而是希望传达一个观念：宇宙中存在的，可以被看作辐射源的物质比比皆是，Wi-Fi的无线信号只是海中沙，只不过是我们经常接触，变得敏感罢了，仅此而已。<br><br>　　Wi-Fi辐射并不可怕<br><br>　　至少未到危机人体健康的地步<br><br>　　无线信号和光波、声波，包括引力一样遵循“平方反比定律”，即距离加倍，能量减少为1/4。换言之，信号强度会随着距离的增减变化，而且幅度很大。在一般的距离上，Wi-Fi无线网络的信号强度接近于电视信号、交流电包括各种电器和电子实体，甚至更低，弱到根本无需过度担心。<br><br>　　微波炉，这件已然成为家庭必需品的小家电，却永远跟辐射脱不了干系，它在所有常用家电辐射排行榜上的霸主地位，和可怕的工作原理注定可以让你感到恐惧。可即便如此，微波炉在市场上依旧卖得火热，用户依旧络绎不绝，那是因为只要我们正确使用它就不会波及健康。那么，相比辐射强度弱微波炉10万倍的无线路由器，是不是小巫见大巫了？<br><br>　　微波炉这玩意完全可以看作是一个定向的无线信号发射塔，工作电压高，辐射强度大，但作用距离却很短；无线路由器则恰恰相反，工作电压要低得多，辐射强度比微波炉弱10万倍，不过它却是一种全向发射，作用距离相对较远的设备。那么，你是希望看到微波炉故障还是无线路由故障？<br><br>　　PS，附赠大家一副Wi-Fi的简要进化史：<br><br>　　<br>　　Wi-Fi无线技术 进化史图表<br><br>　　拿微波炉和Wi-Fi辐谷普下载 www.gpxz.com射做对比，意在让大家了解，不管是辐射强度本身就高的设备，还是辐射作用范围广的设备，只要正确使用，养成好习惯，做好预防，我们大可不必担心它们会危及人体健康。Wi-Fi技术也在加速演进，有效降低无线信号辐射也是科研人员努力的一个方向。

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男女之间会有纯洁的友谊吗？

    　　<br>　　女生：【男女间存在纯洁的友情！】<br>　　男生：【楼上纯属胡说八道！】 为何存在如此的认识差异呢？<br><br>　　到底会有多少人认为男女间存在纯洁的友谊呢？<br>　　采访调查了20-40岁的独身男女，男性和女性认为【当然存在】和【应该是存在的】的人分别占44.6%和57.9%。从[招募新娘研究网站]的调查中可以了解到为什么相对于男性，更多的女性认为男女之间存在纯洁的友情谷普下载www.gpxz.com。<br><br>　　除此之外，从年龄层上看20几岁的男女比30几岁的更相信男女之间存在纯洁的友情。另一方面，男性和女性认为【完全不可能】和【应该不怎么可能】的人分别占21.7%和16.6%。从年龄层上来看，随着年龄的增大，越来越多的男性不相信【男女之间存在纯洁的友谊】，而越来越多的女性则认为【男女之间存在纯洁的友谊】。<br><br>　　虽然想要成为男女朋友，但是只是停留在想想的阶段，最终只能成为朋友。就算是同性之间也存在不纯洁的友谊呢。<br><br>　　女生和女生可以很合得来，但是男生之间就不行<br>　　男女对朋友的定义不同，所以男女之间才存在这样的认识差异<br>　　虽然可能（男女普通朋友）之间一直没注意到对方是（异性），但是一旦男生注意到女生胸部的时候这层关系就要结束了呢。如果是依赖性关系的友情的话，男女对对方的感觉会不同的。男生认为和他有性关系的女性朋友，如果也和别的男生上床的话，就不能再当朋友了；而女生会认为即使有男朋友了，和其他男生上床的话也会坚持说只不过是普通朋友而已。<br><br>　　只是纯洁的友情的话，还是男性同性朋友好啊。<br>　　女生和男生谈话的时候很谈得来，肯定是男生故意顺应附和女生的啊。<br>　　基本上从男生的角度看，和女生谈话什么的真是浪费时间。<br>参考问题男女之间会有纯洁的友谊吗？

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请问“字母文件”下载不了呢？

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“字幕文件”怎样下载？

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行，有意义，我顶 谢谢您了












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