皮皮学，免费搜题
登录
搜题
【单选题】
下列有关机械絮凝池的说法不正确的是？A.
搅拌机转速按叶轮半径中心点线速度通过计算确定，各档线速度逐级增大，线速度宜自第一档的0.2m/s 起逐增大至末档的0.5m/s
B.
机械絮凝池利用电动机经减速装置驱动搅拌器对搅拌，故水流的能量消耗来源于搅拌机的功率输入
C.
絮凝时间一般15~20min
D.
池内一般设3~4档搅拌机，各档搅拌机之间用隔墙分开以防止水流短路，隔墙上下交错开
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】某商店出售某种商品每件可获利m元，利润为20%（利润= 售价-进价 进价 ），若这种商品的进价提高25%，而商店将这种商品的售价提高到每件仍可获利m元，则提价后的利润率为（ ）
A.
25%
B.
20%
C.
16%
D.
12.5%
【单选题】You _______ to the meeting today if you have something important to do. [ ]
A.
needn't to come
B.
don't' need come
C.
don't need coming
D.
needn't come
【简答题】In his cluster of poems called Leaves of Grass, ______gave America its first genuine epic poem.
【判断题】Walt Whitman follows only one theme in his Leaves of Grass, that is, the burgeoning life in cities.()
A.
正确
B.
错误
【简答题】某商品定价比进价高20%，出售时打八八折，结果依然获利润84元．则此商品的进价是多少元？（利润=售价-进价）
【单选题】Who is the author of Leaves of Grass?
A.
Walt Whitman
B.
Emily Dickinson
C.
Nathaniel Hawthorne
D.
Henry Wadsworth Longfellow
【简答题】山莨菪碱的作用特点及主要用途是什么?
相关题目：
【简答题】In his cluster of poems called Leaves of Grass, ______gave America its first genuine epic poem.