Can we play basketball in the____ ____ today?
I will try my best to stop my son from the same mistake.
资料卡片
硝酸(HNO3)是无色液体,有挥发性.硝酸呈黄色是因为硝酸受光照后,分解出红棕色的二氧化氮气体溶于硝酸所致.