A. It is on the desk.
B. I help my mum and dad.
C. He does his homework.
D. She draws a picture.
E. It's a TV.
①2CH3OH(l)+3O2(g)═2CO2(g)+4H2O(g)△H═﹣akJ•mol﹣1
②2CO(g)+O2(g)═2CO2(g)△H═﹣bkJ•mol﹣1
③H2O(g)═H2O(l)△H═﹣ckJ•mol﹣1
则CH3OH(l)+O2(g)═CO(g)+2H2O(l)△H═____ kJ•mol﹣1.
某班学生为探究绿色植物的光合作用,设计如下实验装置甲、乙、丙,请据图作答: