【简答题】根据首字母或汉语提示写出单词 1. Be careful, don't t________ on the step. 2. The nurse cleaned the w_________ before the operation. 3. Andy has a _________ (发烧) and won't be coming into the work today. 4. I was ups...
【简答题】In classical physics, the mass of an object had always been associated with an indestructible material substance, with some “stuff” of which all things were thought to be made.