問題詳情

8.Mad cow disease
(A) causes a fatal brain disease in cows
(B) is very common in the U.S. and Canada.
(C)is caused by a parasite found in animal feed.
(D) is easily transmitted to humans.

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)