导致工业性皮肤病最常见的机械性损伤是()
A．摩擦
B．色素沉着
C．胼胝
D．甲损伤
参考答案：A
— Can you come down a little? I usually buy things here.
— Sorry, __________.[ ]
A. it's one price for all
B. it's up to you to decide
C. you are welcome here
D. it just depends
