一 These clothes are all out of date. Let's go and buy some new clothes.
一 I can't agree more. Let's go.
A:expensive
B:old-fashioned
C:tight
(i)H2(g)+ 12 O2(g)═H2O(g)△H1=﹣Q1 kJ•mol﹣1
(ii)2H2(g)+O2(g)═2H2O(l)△H1=﹣Q2 kJ•mol﹣1
(iii)2H2(g)+O2(g)═2H2O(g)△H1=﹣Q3 kJ•mol﹣1
则Q1、Q2、Q3的关系表示正确的是( )
15-9=____
8-3=____
9+3=____
14-4=____