题目

（2010·黑龙江哈九中高三上第二次月考）      25. --Why does the river smell terrible? --Because large quantities of water__________. A. have polluted                   B. is being polluted C. has been polluted        D. have been polluted 答案：D下列叙述正确的是（  ） A．稀硝酸、稀硫酸均能将木炭氧化成二氧化碳 B．Na2O2与水反应，红热的Fe与水蒸气反应均能生成碱 C．Li、C、P分别在足量氧气中燃烧均生成一种相应氧化物 D．NaHCO3、Na2CO3、（NH4）2CO3三种固体受热后均能生成气体