A：胶体区别于其他分散系的本质特征是分散质的微粒直径在10﹣9m～10﹣7m之间
B：用平行光照射NaCl溶液和Fe（OH）3胶体，可以加以区分
C：把FeCl3饱和溶液与NaOH溶液混合，以制取Fe（OH）3胶体
D：除去Fe（OH）3胶体中的H+、Cl﹣，可用渗析的实验方法
Dear Jenny, Please take these things to your brother: his math book, baseball, notebook, CDs, and video tape. The math book is on the dresser. The baseball is under the bed. The notebook is on the bed. The CDs are in the drawer. The video tape is on the table. Thanks! Mom
