单项选择题
A.31%B.33%C.35%D.37%
A.60℃B.75℃C.45℃D.80℃
A.20.5B.20C.20.4D.21
A.0.036B.0.037C.0.035D.0.0360
A.-450B.-460C.-470D.-455
A.0.56B.0.54C.0.55D.0.57
A.1.0B.1.1C.1.06D.1.05
A.11B.10C.12D.9
A.1300B.1400C.1370D.1360
A.13.2B.13.1C.13.0D.13.3
A.15B.14C.16D.15.1