17、磁共振质子群能态跃迁,是指:() The energy state transition of proton group in magnetic resonance is defined as:()
A.中等能态跃迁到高能态 Transition from medium energy state to high energy state
B.高能态跃迁到低能态 Transition from high energy state to low energy state
C.中等能态跃迁到低能态 Transition from medium energy state to low energy state
D.低能态跃迁到高能态 Transition from low energy state to high energy state
E.低能态跃迁到中等能态 Transition from low energy state to medium energy state