下列表示对应化学反应的离子方程式正确的是

A．碳酸钙溶于醋酸：CaCO₃＋ 2H⁺ = Ca²⁺＋ CO₂↑＋H₂O

B．苯酚钠溶液中通入少量的CO₂：

C．用铜做电极电解CuSO₄溶液：2Cu^2＋＋2H₂O2Cu↓＋O₂↑＋4H^＋

D．用银氨溶液检验乙醛中的醛基：CH₃CHO＋2Ag(NH₃)₂^＋ ＋2OH^－CH₃COO^－＋NH₄^＋＋3NH₃＋2Ag↓＋H₂O

阅读表达。

     Every year people celebrate Chinese New Year in China. (1)Usually it is in January or February. It is the most

important festival in China. So before it comes, everyone buys things, and they often make a special kind of food

called dumplings. The dumpling means "coming together". (2)Parents always     new clothes     their children and

children also buy presents for their parents. On Chinese New Year's Eve, all the family members come back home.

They sing, dance and play cards . When they enjoy the meal, they give each other the best wishes for the coming

year. They all have a good time.

1. 将(1)句译成中文                                             

2. 回答问题Is Chinese New Year the most important festival in China?

3. 在(2)句空白处填上适当的词,使句子完整                   

4. 从文中找出下列句子的同义句   All of them have fun.

5. 找出最能表明文章主题的句子