含泥量指原砂中直径小于（）的细小颗粒的含量，其中有粘土、极细的砂子、其他非粘土质点。
参考答案：0.02mm
in faraway northwest, this place has its beautiful fresh air．
A．Being located
B．Located
C．locating
D．To be located
葡萄、月季、柳树等一般采用扦插的方法进行繁殖。
