A.45.33 B.40.14 C.42.58 D.37.21
A.64.0% B.37.2% C.62.8% D.36.0%
A.2011>2012>2008 B.2010>2008>201 1 C.2009>201 1>2012 D.2010>2009>2011
A.降低了2% B.降低了6% C.提高了2% D.提高了6%