关于液体制剂的防腐剂叙述错误的是() A.对羟基苯甲酸酯类在酸性溶液中作用最强,而在弱碱性溶液中作用减弱 B.对羟基苯甲酸酯类几种酯联合应用可产生协同作用,防腐效果更好 C.苯甲酸和苯甲酸钠对霉菌和细菌均有抑制作用,可内服也可外用 D.苯甲酸其防腐作用是靠解离的分子 A. 1 B. 1 C. 1 D. 1
【单选题】Suppose one year ago the price index was 120 and Maria purchased $20,000 worth of bonds. One year later the price index is 126. Maria redeems his bonds for $22,250 and is in a 40 percent tax bracket. ...
【简答题】Paid cash of $40,000 to a real estate company to acquire land. Journalize the preceding transactions of Calderon Service Center, Inc.: 1 xxx 2 $xxx 3 xxx 4 $xx...