問題詳情
39. According to the passage, which of the following is true of tannins?
(A) They are produced when the bacteria digest the food.
(B) They help to get rid of some bacteria in the mouth.
(C) They help chocolate to dissolve more quickly.
(D) They destroy the surface of the teeth.
(A) They are produced when the bacteria digest the food.
(B) They help to get rid of some bacteria in the mouth.
(C) They help chocolate to dissolve more quickly.
(D) They destroy the surface of the teeth.
參考答案
答案：[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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