治疗外伤后脑水肿疗效最快的药物是()
A．20%甘露醇
B．25%的山梨醇
C．50%的葡萄糖
D．50%的甘油
E．激素
参考答案：A
More and more trees should be planted in spring to________sandstorms happening frequently. [ ]
A. protect
B. prevent
C. keep
D. care
藏书补充的购入方式包括哪些内容？
