简述皮毛、皮革加工企业的主要水污染物种类，污水监管采样点的位置，固体废弃物的种类、来源和环境管理措施？

A. In the past 10 years, U. S. population increased less than 10%.
B. Texas has the largest population among all the states in the U. S.
C. Nevada"s population increased the fasted among all the states.
D. The largest increases were in the southern and western states.

A. rise
B. range
C. vary
D. keep