问题 选择题 Read and match. (给下面的单词找到相应的解释)( )1. last ( )2. prepare( )3. present( )4. leave ( )5. climb A. gift B. to get up or down C. after all others D. get or make ready E. go away from 答案 1.C 2.D 3.A. 4.E 5.B
NH4+ + OH-