【简答题】The cylinder block is the largest part of the engine. It has cylinder in which the pistons operate and bearings which carry the crankshaft. In some engines, the cylinder block also carries the camsha...
【判断题】反应分子数不可能为负值,而反应级数可以是负值。
【多选题】In which part of the story can we create suspense? Choose the one s that are applicable.
【判断题】元反应的反应级数也可能与反应式中相应反应物的化学计量数的和不一致