問題詳情

62 (  ) Why are hard candies especially bad for teeth?    
(A)They may break the child’s teeth. 
(B)They contain too much sugar.    
(C)They help bacteria to produce tannins. 
(D)They stay in the mouth for a long time.

參考答案

答案:D
難度:非常困難0
統計:A(0),B(0),C(1),D(0),E(0)

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