下列有关凡士林的表述错误的是
A. 分黄白两种，均可用于眼膏剂中。
B. 凡士林中加入适量羊毛脂、胆固醇或某些高级醇类可提高其吸水性能。
C. 属于烃类化合物
D. 是一种半固体状物
O/W型乳膏剂中常加入的附加剂有
A. 保湿剂
B. 防腐剂
C. 乳化剂
D. 增塑剂
When I answer the phone and want to know who is calling, I should say:
A. Who’s there, please?
B. Who are you, please?
C. Who’s calling, please?
When a caller asks for someone who isn’t in, I should say:
A. He’s not here.
B. I’m sorry, but she’s not here right now. Would you like to leave a message?
微信支付 
支付宝支付