单项选择题
A.40%~60%B.50%~60%C.50%~70%D.70%~85%
A.4000V/m,2V/mB.5000V/m,1.8V/mC.4000V/m ,1.1V/mD.5000V/m ,1.5V/m
A.200µT ,12µTB.100µT ,0.9µTC.100µT ,0.6µTD.200µT,21µT