1.5TMRI设备最高配置的梯度线圈（）

A.场强已达25mT/m，切换率超过120mT/m.s

B.场强已达30mT/m，切换率超过100mT/m.s

C.场强已达45mT/m，切换率超过150mT/m.s

D.场强已达60mT/m，切换率超过200mT/m.s

E.场强已达80mT/m，切换率超过200mT/m.s