_________ you can join us.[ ]
A. Maybe
B. May be
C. Canbe
D. Can be
答案：A
—Sorry,l forgot tobring your tape.
—______ You can bring it next time.[ ]
A. It doesn't matter.
B. You're welcome.
C. That sounds good.
D. I'd love to．
接触角（）
A.粉体流动性
B.粉体润湿性
C.水溶性粉体的吸湿性
D.粉体粒子大小
E.粉体的压缩性
