在MR上下列哪种肿瘤看不见化学位移伪影()
A.皮样囊肿
B.脂肪瘤
C.畸胎瘤
D.神经鞘瘤
E.胆脂瘤
参考答案:D
After the earthquake, the local rescuers looked everywhere______ the survivors.
A.in search of
B.in search
C.searching of
D.searched for
动脉性充血只发生于生理状况下。