— How much _______ the trousers?
— _______ 88 yuan.
A:is; It
B:are; They
C:is; It’s
D:are; They’re
已知:①S(单斜,s)+O2(g)═SO2(g)△H1=﹣297.16kJ•mol﹣1
②S(正交,s)+O2(g)═SO2(g)△H2=﹣296.83kJ•mol﹣1
③S(单斜,s)═S(正交,s)△H3
下列说法正确的是( )