曝气池混合液中工作的污泥总量为40kg,每天排放的剩余污泥为10kg,问:污泥龄为多少?
参考答案:
40/10=4天
污泥龄为4天。
缩胆囊素引起胰液分泌特点是()。
A.水少,盐和酶多
B.水多,盐和酶少
C.水少,酶少,盐多
D.水多,盐多,酶少
E.水少,盐少,酶多
We had wanted to finish our task by noon, but it didn't quite _____ as planned. [ ]
A. find out
B. give out
C. hand out
D. work out