句型转换。

1. Tom wants to have a party because next Saturday is his birthday. (就画线部分提问)      

                               Tom want to have a party?  

2. The little boy is very short. He can't get the book on the shelf. (改为同义句)      

The little boy___         ,                  ,                ,               get the book on the shelf.

3. Be careful，or a car may hit you. (改为同义句)   

       ___         ____       _____ careful, a car may hit you.

4. I don’t think he is right. (改为反意疑问句)      

I don't think he is right,                     _________?

5. He joined the army 2 years ago. (改为同义句)         

He                                       the army for 2 years.

对碳酸钙的分解反应CaCO₃(s)==CaO(s)+CO₂(g) ΔＨ＝178.3 kJ·mol^－1　ΔＳ＝169. 3 J·mol^－1·K^－1,分析此反应在室温下能不能自发进行，假定反应焓变与熵变不随温度变化，求此反应的分解温度。