题目

根据所给例子，将下列句子改写为对话。例：I don't have a soccer ball．→ —Do you have a soccer ball?—No, I don't （1） We have two basketballs．→ （2） Helen doesn't have an eraser→ （3） He has a blue jacket．→ （4） They have four dictionaries．→ 答案：【1】—Do you have two basketballs?【2】—Yes, we do. 【1】—Does Helen have an eraser?【2】—No, she doesn't. 【1】—Does he have a blue jacket?【2】—Yes, he does 【1】—Do they have four dictionaries?【2】—Yes, they do.微生物燃料电池(MFC)是一种现代化氨氮去除技术。下图为MFC碳氮联合同时去除的转化系统原理示意图。下列说法正确的是A. 好氧微生物反应器中反应为：NH4++2O2==NO3－+2H++H2OB. B极电势比A极电势低C. A极的电极反应式CH3COO－+8e－+2H2O==2CO2+7H+D. 当电路中通过1mol电子时，理论上总共生成2.24LN2