問題詳情
【題組】20. Through repeated experiments, Robert Koch discovered that anthrax, a disease killed thousands of cattle every year, was caused by certain germs, but how to cure it or how to prevent it was still beyond him.
(A)
(B)
(C)
(D)
(E)
參考答案
答案：B
難度：非常簡單1
統計：A(0),B(3),C(0),D(0),E(0) #
個人：尚未作答 書單：沒有書單，新增