A.2.8% B.11.6% C.12.4% D.22.1%
A.降低了9.2 B.提高了9.2 C.降低了0.4 D.提高了0.4
A.2718.2 B.2887.0 C.2973.2 D.3021.4
A.18.4 B.15.3 C.14.7 D.23.4