美容师指导顾客掌握家庭美容护理方法时，不需（）。
A.解释护理效果的个体差异
B.自我护理要点
C.掌握自我护理方法
C.明确季节护理差异
参考答案：A
— Mr. Wang, have you corrected the papers?
— Yes, but I regret that you didn't pass it. [ ]
A. to say
B. saying
C. said
D. to have said
什么是桨叶失速现象？
