下列用于中药提取液中药物分子分离的滤过方法是
A. 微孔滤膜滤过
B. 石棉板滤过
C. 超滤法
D. 垂熔滤器滤过
E. 离心分离
Many gifts would like to ______ skirts in Summer.
A. put on
B. dress
C. wear
If you want to know how birds are endangered and how they should be protected, which chapter would you refer to
A. Chapter ⅩⅠⅤ
B. Chapter ⅩⅢ
Chapter ⅩⅤ
I ______already ______three dishes, shall I finish washing, mum
A. had... broken
B. have... broken
C. have... break