题目

 “Humans should not try to avoid stress any more than they would shun food, love or exercise.” said Dr. Hans Selye, the first physician to document the effects of stress on the body. While here’s no question that continuous stress is harmful, several studies suggest that challenging situations in which you’re able to rise to the occasion can be good for you.In a 2001 study of 158 hospital nurses, those who faced considerable work demands but coped with（设法处理） the challenge were more likely to say they were in good health than those who felt they couldn’t get the job done.以下一些氧化物和单质之间可发生如下图所示的反应 其中，氧化物（Ⅰ）是红棕色固体、氧化物（Ⅱ）、（Ⅲ）、（Ⅳ）在反应条件下都是气体。（1）氧化物（Ⅰ）的化学式（分子式）是_________。氧化物（Ⅱ）的化学式（分子式）是_________。（2）反应①的化学方程式是__________________。反应②的化学方程式是__________________。反应③的化学方程式是__________________。