利用顾客求廉心理，特意将某几种产品的价格定的较底以吸引顾客，是采用的（）。

A、撇脂定价

B、招徕定价

C、价格歧视

D、折扣定价

________ mainly for the invention of the telephone, Alexander Graham Bell devoted his life to helping

the deaf.[ ]

A. Remembered

B. To be remembered

C. Having been remembered

D. Though remembered