普通抹灰
参考答案：
是一般抹灰的最低一级，通常由一层底层、一层中层和一层面层组成。
They lost their way in the forest, and . Which of the following is wrong?
A．what made matters worse was that night began to fall
B．what was worse, it was getting dark
C．to make matters worse that night was falling
D．worse still, night had fallen
微囊质量的评定不包括( )。
A．形态与粒径B．载药量C．包封率D．微囊药物的释放速率E．含量均匀度
