問題詳情

45 Which of the following statements about sewer pipes is true? 
(A)They are a product of the 20th century. 
(B)The acidity of the sewage does no damage to the pipes.
(C)They are underground. 
(D)Their repair always comes in time.

參考答案

答案:C
難度:適中0.564103
統計:A(3),B(6),C(22),D(6),E(0)

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