【简答题】《新标准》对1-2年级音乐体裁与形式提出的标准是什么?
【单选题】Annealing can make metal
【简答题】Annealing is a way of metal softer by heating it and then letting it cool very slowly. If metal is heated and then cooled very quickly, for example by dipping (浸) it in water, it will be very h...
【单选题】At what temperature do annealing of DNA and primer takes place? ____________
【简答题】Annealing is a way of metal softer by heating it and then letting it cool very slowly. If metal is heated and then cooled very quickly , for example by dipping it in water , it will be very har...