A:A―→F ΔH=-ΔH6
B:A―→D ΔH=ΔH1+ΔH2+ΔH3
C:ΔH1+ΔH2+ΔH3+ΔH4+ΔH5+ΔH6=0
D:ΔH1+ΔH6=ΔH2+ΔH3+ΔH4+ΔH5
Linda is _______ her mother in many ways. For example, they are both tall and thin.
①真空包装水果可延长保存期 ②沼气发酵
③利用葡萄、粮食和酵母菌制酒 ④温室大棚适当增加二氧化碳肥料提高光合效率.