单项选择题
A.5e-0.2B.20e-4C.20e-0.2D.5eE.5e-4
A.35000B.25000C.31500D.37000E.32800
A.AB.BC.CD.DE.E
A.0.7236B.0.7458C.0.7569D.0.7896E.0.7992
A.3,8B.2,7C.2,8D.4,7E.3,6
A.250B.260C.270D.280E.290
A.0.8400,0.4357B.-0.8400,-0.4357C.-0.8400,0.4357D.-0.8399,-0.4536E.-0.8400,0.8400
A.50B.52C.55D.57E.59
A.214.8B.238.8C.269.8D.294.8E.320.8
A.0.125B.0.25C.0.38D.0.50E.0.63