【简答题】Unit 5 Background.ppt ____ 1. members a. stay away from _____2. b. people who are in a group, club, or organization _____3. support c. good helpful, not negative __...
【简答题】I just heard ____ bank where Dora works was robbed by____ gunman wearing a mask. A. the; / B. a; / C. the; a D. a; the 2. There is no need to tell me your answer now. Give it some ___...
【简答题】Learner Activity 2 Complete the crossword on the below : ACROSS 1. A meeting to gain support, give information and training relating to change. 3. An informal meeting or chat with no agenda that a...
【单选题】胶体区别于其它分散系最本质的特征是( )
【单选题】胶体区别于其他分散系最本质的特征是( )
【单选题】Fe(OH) 3 胶体区别于FeCl 3 溶液最本质的特征是( )
B.
Fe(OH) 3 胶体粒子的直径大小在1~100nm之间