合用可增强双香豆素抗凝作用的药物有（）
A.四环素
B.阿司匹林
C.甲磺丁脲
D.甲硝唑
E.西咪替丁
参考答案：A, B, C, D, E
She was with the belief that one must return what one has borrowed.
A．brought about
B．brought back
C．brought up
D．brought out
矿石的气孔度有（）气孔度和面积气孔度两种表示法。
