from other continents for millions of years, Australia has many plants and animals not found in  any

other country in the world.     [ ]

A. Being separated                

B. Having separated      

C. Having been separated            

D. To be separated

下列关于软膏基质的叙述错误的是（）

A.遇水不稳定的药物宜于选择乳剂型基质制备软膏

B.常用的软膏基质有油脂性、乳剂型和水溶性基质三种

C.凡士林作为油脂性基质特别适用于遇水不稳定的药物

D.凡士林不适用于有多量渗出液的患处

E.凡士林中加入羊毛脂、胆固醇可提高其吸水性能