【判断题】矿物抵抗外力刻划、研磨的能力即矿物的硬度。()
【判断题】矿物抵抗外力刻划研磨的能力称为矿物的硬度。()
【单选题】The meanings of a word may be influenced by the structure in which it occurs. The structure in which the word in question appears can be called ________ context.
【简答题】机器学习四要素DMCA中D指的D是____。
【单选题】一种矿物用小刀不能刻划动,但用石英晶体可以刻划动,则这种矿物可能为( )
【简答题】The word, friend, covers a wide range of meanings. It can be a nodding acquaintance, a comrade, a confidant, a partner, a playmate, an intimate colleague, etc. Everyone needs friendship. No one can sa...
【单选题】一种矿物用指甲不能刻划动,但用小刀可以刻划动,则这种矿物可能为( )
【多选题】用简易刻划法测定矿物硬度时,指甲硬度为 [填空(1)] ;铜钥匙的硬度为 [填空(2)] ; 小刀的硬度为 [填空(3)]
【单选题】碗扣式钢管脚手架的挑梁分为宽挑梁、()。