A:KNO3、HCl、CuCl2
B:Ba(OH)2、BaCl2、、Na2SO4
C:Na2CO3、NaCl、Ca(OH)2
D:NaOH、KCl、H2SO4
化简比、求比值:
5.4:18 20分钟:2小时
在无色透明的强碱性溶液中能大量共存的离子组是( )
句子翻译。
⑴Welcome home!
⑵The earth goes around the sun.
⑶It was Daming's birthday yesterday.
⑷This is a book about food.
⑸I'm interested in space travel.
first:____ loudly:____ learn:____
national:____ go:____