6) guinea and feather experiment 「硬币与羽毛」实验补充资料:硬度试验 在古代,人们就用软硬的概念来品评金属质量,还用金属互压、异物压入或划伤等原始方式来比较研究金属的软硬。至19世纪中叶,钢铁应用日趋广泛,硬度测试方法和设备的研究也广泛展开;到本世纪20年代前后,布氏、肖氏、洛氏和维氏硬度试验机相继...
网络释义 1. 猜硬币 StatcForce - kichy-杂谈吧 | 微吧 一起扎堆吧! ... 8.对折空间( Fold space) 2.猜硬币(Tossing a coin) 3.无物( Nothingnes… weiba.weibo.com|基于4个网页 2. 投硬币 重复任务 -... ... 复活羽毛(新兵) Beginner's Feather投硬币Tossing a Coin奉献奖章交换 Trade Seals ...
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