問題詳情

25. ________are among the oldest living organisms on Earth, and are very small. The ______are a large group of unicellular, prokaryote, microorganisms. Some types of ______ cancause diseases and become harmful to the environment.
(A) bacteria
(B) Opposite
(C) Aquarium
(D) Exhibition

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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