問題詳情
【題組】38. According to the passage, xenobots are environment friendly because _____.
(A) they are powered by batteries
(B) they eat microplastics in the ocean
(C) they become dead cells after a week or longer
(D) they are less than one millimeter wide
參考答案
答案：C
難度：計算中-1
書單：沒有書單，新增