什么是颗粒度?
参考答案:
存在于油品单位体积内不同粒径的固体微粒的数目浓度。
Hangzhou is ______ a beautiful place ______ almost everyone enjoys it very much. [ ]
A. so; that
B. such; as
C. such; that
D. so; as
为了防止计算机病毒的传染,措施之一是对长时间不使用的软盘经常格式化。 ( )