题目

What is the man?A. A secretary. B. A teacher. C. A doctor. 答案：【答案】C【解析】M: So, what seems to be the problem?W: Well, I’m not feeling very well. I’ve got a really bad headache, a cough and my throat hurts.M:Ok, come and lie down over there.此为听力题，解析略。（2006?南通）“NaCl+CO2+NH3+H2O=NaHCO3↓+NH4Cl”是著名的“侯氏制碱法”的重要反应．下面是4位同学对该反应涉及的有关知识发表的部分见解．其中不正确的是（ ）A．B．C．D．