—— Have you considered _____ your job as a teacher?

——Yes. I like the job because a teacher is often considered _____ a gardener.

A．to change; to be

B．to change; being

C．changing; being

D．changing; to be

与SE序列相比，FSE或TSE序列的主要优点在于（）

A、T1对比更好。 

B、T2对比更好。 

C、伪影更少。 

D、信噪比更高。 

E、加快了成像速度。