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)

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