由肾小球滤过排出的物质有（）
A.各种胺类
B.含氮类废物
C.苯甲酸
D.马尿酸
E.尿酸
参考答案：A, B, C, D, E
The concentration of a certain chemical in a full water tank depends on the depth of the water. At a depth that is x feet below the top of the tank, the concentration is 3
parts per million，where 0＜x＜4. To the nearest 0.1 foot, at what depth is the concentration equal to 6 parts per million
帕克认为生物学规则同样适合于城市结构分析，理由是什么？
parts per million，where 0＜x＜4. To the nearest 0.1 foot, at what depth is the concentration equal to 6 parts per million