题目

A man shot two students died and wounded five other at an Australian university in Monday, after he was overpowered by classmates of the victims (受害者). The two dead were both male of Asian appearance in his early 20s. The others have being treated for minor(未成年的)injuries. The man, in his mid-30s and of Asian appearance, was seized several students in classroom at Monash University, Melbourne and was late arrested. 11．下列实验操作错误的是（　　）A．浓硫酸的稀释B．除去氯气中氯化氢C．碳酸、苯酚酸性强弱比较D．氯化氢气体的吸收