“干燥失重”是指在规定的条件下,测定药品中所含能被驱去的何种物质,从而减失重量的百分率
A.水分
B.甲醇
C.乙醇
D.有机溶剂
E.挥发性物质
参考答案:E
It is said that the old coins ______ under the earth for about 100years by the time they were discovered.
A.had buried
B.had been buried
C.buried
D.were buried
治疗阵发性室上性心动过速的首选药是()
A.奎尼丁
B.苯妥英钠
C.维拉帕米
D.普萘洛尔
E.利多卡因