The price of the goods in this shop is too high. I can buy only half the goods I bought in that shop and I’m paying ________.

A．as three times much

B．as much three times

C．much as three times

D．three times as much

Nisin是一种由乳酸乳球菌在代谢过程中合成和分泌的小分子肽，下列有关Nisin说法错误的是（）。

A.Nisin是一种生物防腐剂

B.Nisin是唯一能用于商业化生产的细菌毒素

C.Nisin具有较强的抑菌作用而被用于食品防腐剂

D.Nisin已被世界卫生组织和世界粮农组织同意用于食品工业