不同材料硬度对比Which one of the following materials has the highest hardness?一下那种材料的硬度最高?alumina ceramic 氧化铝gray cast iron 灰口铸铁hardened tool steel 硬化钢polystyrene 聚苯乙烯

不同材料硬度对比Which one of the following materials has the highest hardness?一下那种材料的硬度最高?alumina ceramic 氧化铝gray cast iron 灰口铸铁hardened tool steel 硬化钢polystyrene 聚苯乙烯 为什么不同材料的硬度不同 one of them one of which有什么区别? one of which is that.表示不懂. Which one of these do you want? Which one! Which one! one of which中which一定指代名词复数吗 材料硬度 随便什么材料 pvc-vx329材料硬度 什么材料硬度60 C5191材料硬度是多少 收集一些不同材料的针织品,闻气味并燃烧后观察残留物的硬度 对比以上材料,简述德日两国对待战争历史问题的态度有何不同 材料硬度硬度的换算公式 which one? Which of these trains is the one[]goes to Nanjing?A.which B .of which C.of these D.that 岩石为什么硬度不同? Which of the three inventions is_____(useful)one?