颗粒荷电性
参考答案：
颗粒荷电性是指粉状颗粒在运动过程中，由于撞击、摩擦放射性照射以及电荷放电等作用而使颗粒荷电。
泄泻丸功效与作用
－Why have you decided on the countryside for your holiday?
－Because we are there is lots of clear, fresh air there.
A．so many
B．much
C．many
D．several
