What will be available for free
A. Water.
B. Soft drinks.
Cookies.
混合不均匀或可溶性成分迁移（）.
A. 裂片
B. 均匀度不合格
C. 黏冲
D. 色斑
E. 片重差异超限
What did the speakers do today
A. They went to an exhibition about space.
B. They saw a movie about space.
C. They visited a history museum.
表征颗粒流动性的参数是（）.
A. 比表面积
B. 休止角
C. 孔隙率
D. 粒度
E. 接触角
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