非处方药分为甲、乙两类的依据是（）
A.安全性
B.有效性
C.稳定性
D.均一性
E.经济性
参考答案：A
i e c b
Of the 2,000 stock investors______last month,90% was found_____in financial knowledge [ ]
A. surveyed;lacking
B. having been surveyed;to lack
C. surveyed;lacked
D. to have been surveyed;lack
