商品保管的“三不”是指不准（）、不准白条顶库、不准动用商品。
A、损坏商品
B、私分商品
C、借出商品
D、监守自盗
参考答案：C
— ___________________
— I have three books.[ ]
A. How many books do you have?
B. How many book do you have?
C. How many books do you?
D. How many books you have?
皮肤附属器包括毛发、皮脂腺、（）和甲，由外胚层分化而来
