Wesley55688 wrote:小弟自然科學沒有學太...(恕刪)
cucubird wrote:一公斤重的水,跟一公斤重的水蒸氣...那個比較重....(恕刪)
Monster0707 wrote:答案當然是一樣重呀~...(恕刪)
kenyeh99 wrote:一公斤的水蒸氣怎麼稱...(恕刪)
asd79979 wrote:你買多少?(電磁閥+瓶子)恕刪)