粉末的工艺性能主要包括松装密度和振实密度、流动性、（）。
参考答案：压制性
在一个不透明的口袋中，装有5个红球4个白球，它们除颜色外都相同，从中任意摸出一个球，摸到红球的概率为_______．
Could you tell me____________?[ ]
A. where is the headmaster
B. whose camera it is
C. what Jack was happened
D. how long does it take you to the
