MRI头颅病变表现为短T1、短T2者（）
A.急性出血
B.脂肪类肿瘤
C.黑色素瘤
D.垂体瘤
E.肿瘤卒中
参考答案：C, E
I _____ my dictionary. I can't lend it to you. [ ]
A. lose
B. will lose
C. losing
D. have lost
