题目

The camera has a lot of small buttons, ____________ makes it rather awkward to use. A. that             B. what              C. as                   D. which 答案：D11．下列事实不能说明CH3COOH位弱酸的是（　　）A．测得0.10mol/LCH3COOH溶液中存在较多的CH3COOH分子B．比较等浓度等体积的盐酸、CH3COOH溶液与足量Zn反应生成H2的体积C．比较等浓度等体积的盐酸、CH3COOH溶液与等量NaOH溶液反应后放出的热量D．0.10mol/LNH4Cl呈酸性，0.1mol/LCH3COONH4溶液呈中性