Lucy was one of my best friend at high school. At that time, we often spend time together. Thank to her help, I made great progresses in my study. Last year, she decided to study abroad. In other words, we would be separated for long time. Before she was left, I prepared a gift to show my best wishes to him. She said it was a best gift she has ever had. From then on, we’ve kept in touch with each other through e-mail. I look forward to see her again in the near future.

具有（）的粘土岩，以手触摸有明显的颗粒感。

A.泥状结构

B.含粉砂泥状结构

C.粉砂泥状结构

D.砂质泥状结构