问题
选择题
— Mother's Day is coming. What will you give to your mother?
— I will buy ____ some flowers. [ ]
A. her
B. she
C. hers
D. herself
答案
答案：A
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— Mother's Day is coming. What will you give to your mother?
— I will buy ____ some flowers. [ ]
A. her
B. she
C. hers
D. herself
答案：A
有白色沉淀，说明原溶液中有Cl－
有白色沉淀，说明原溶液中有SO42－
有蓝色沉淀，说明原溶液中有Cu2+
生成无色气体，说明原溶液中有CO32－