在MR上下列哪种肿瘤无化学位移伪影()
A.脂肪瘤
B.畸胎瘤
C.胆脂瘤
D.神经鞘瘤
E.皮样囊肿
参考答案：D
Mr Brown with his wife and children _______ going to Hong Kong next week. [ ]
A. are
B. has
C. is
D. have
基于分子外层价电子吸收一定能量后，由低能级跃迁到较高能级产生的吸收光谱（）
A.红外吸收光谱
B.荧光分析法
C.紫外-可见吸收光谱
D.质谱
E.电位法
