膜分离过程中，料液浓度升高，则（）。
A.粘度下降，截留率增加
B.粘度下降，截留率降低
C.粘度上升，截留率下降
D.粘度上升，截留率增加
参考答案：D
Theodore Dreiser belonged to the school of literary ______ which .emphasized heredity and environment as important deterministic forces shaping individualized characters who were presented in special and detailed circumstances.
A. naturalism B. realismC. determinism D. humanism
贵金属基底冠喷砂常用材料是
A．40目的金刚砂B．80目的金刚砂C．40目的氧化铝砂D．80目的氧化馅砂E．40目的石英砂
