治疗脑水肿，下列药物哪一种最常用且效果较好（）
A.50%葡萄糖
B.30%尿素
C.25%山梨醇
D.20%甘露醇
E.浓缩血清白蛋白
参考答案：D
An awful traffic accident did, the other day,_________ in the street. [ ]
A. occurred
B. occur
C. occurred to
D. occur to
动物血型试剂
