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问题 单项选择题

健康保险的给付一般分为（ ）。①医疗费用给付 ②失能保险给付③长期护理保险给付④死亡给付

A．①②③

B．②③④

C．③④

D．①③

答案

参考答案：A

改错题
短文改错。只有一行正确，其余每行均有一处错误。
      Bad weather sometimes causes natural disasters. A snowstorm hitted      
Beijing on Saturday, 28th December. The storm got bad in the afternoon.
Tom was on a farm and Uncle Li told him  go home late. Li Ming       
asked him to go to his house because Tom forgot to take his keys. So   
Tom walked to the bus stop on his umbrella with Li Ming. The weather     
was really terrible. They could only listen the wind. Snowstorm                        
continued to fall around them. Sudden they lost their umbrellas in the   
wind and Tom nearly fell over. They could do nothing and walk slowly    
in the storm. When they arrived in the bus stop, they could see many  
people. They was really worried as there would be no bus soon.         		1. _________    
2. _________   
3. _________   
4. _________   
5. _________   
6. _________                   
7. _________   
8. _________   
9. _________   
10. ________  
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填空题

（A、B、C为短周期元素．A为常见的金属，B在常温下为固体，它的最高价氧化物的水化物D为常见强酸，C的最高价氧化物的水化物E为常见强碱．A、B、C及化合物的其转化关系如图：

请回答下列问题：

（1）写出D的化学式______，B与C形成的化合物的电子式为______；

（2）写出反应③的离子方程式______．

（3）标准状况下，等质量的A分别与足量的D、E反应，产生H2的体积分别为V1、V2，其关系为V1______V2（填＜、＞或=）．若V2=2.24l，则反应过程中转移的电子的物质的量为______．
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