以下各种表面活性剂中毒性最强的是( )
A.吐温-60B.肥皂C.司盘-20D.平平加E.氯苄烷铵
参考答案:E
in her best skirt, the girl tried to make herself at the party.
A.Dressed; noticed
B.Dressing; noticing
C.Dressing; noticed
D.Dressed; noticing
按年末总人口计算,2005年人口增长率为()
A.5.91‰
B.5.21‰