根据浮选过程的特点，对浮选机有什么要求？
参考答案：
（1）良好的充气作用。
（2）搅拌作用。
（3）能形成较平稳的泡沫区。
（4）能连续工作及便于调节。
混凝土浇水养护日期，应根据混凝土强度按有关规定办理。
The nurse is providing care for a client who underwent mitral valve replacement. The best example of a measurable client outcome goal is to （）.
A．change his own dressing.
B．walk in the hallway.
C．walk from his room to the end of the hall and back before discharge.
D．eat a special diet.
