在体外无创地显示活体内生理和病理过程（）
A.MR
B.PET
C.PET／CT
D.MRS
E.SPECT
参考答案：B
The man _____ talked to you just now is a coach of the football team. [ ]
A. whose
B. which
C. that
D. whom
300MW引进型汽轮机平衡活塞有几个？请简单描述其安装位置？
