下列哪个可作起全身作用的油溶性药物栓剂的基质()
A.聚氧乙烯
B.泊洛沙姆
C.可可豆脂
D.聚乙二醇
E.MMC
参考答案:C
常用的钢结构连接方法中,广泛应用于可拆卸连接方法是()。
A.焊接连接
B.螺栓连接
C.铆接连接
D.销键连接
You mustn't the whole story. Keep this as a total secret between you and me. [ ]
A. give off
B. give up
C. give in
D. give away