阿摩線上測驗
38. Which of the following can be removed in the primary tanks?
(A) Wood.
(B) Heavy material.
(C) Grease.
(D) Organic matter.
答案：登入後查看
統計： A(34), B(33), C(139), D(14), E(0) #2379977
統計： A(34), B(33), C(139), D(14), E(0) #2379977
詳解 (共 2 筆)
EllenCold
#4280030
In the second step, the sewage passes into the primary tanks. Here, human waste, called sludge, settles to the bottom while oils and grease float to the top, where they are collected. 在第二步中，污水進入主水箱。在這裡，稱為污泥的人類廢物沉澱在底部，而油脂則漂浮在頂部，並在那裡收集。
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