Clare has offered a _______ of $ 100 to anyone who can find her lost cell phone.

A．benefit

B．cost

C．reward

D．price

预防酸蚀症措施中错误的是（）

A.接触酸的工种戴防酸口罩

B.普及牙酸蚀症的基本知识

C.餐后不能马上喝牛奶

D.减少碳酸饮料的摄入量

E.咀嚼无糖口香糖促进唾液分泌