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用化学方程式说明问题：

（1）用氢氧化铝中和胃酸过多：______．

（2）火碱溶液要密封保存：______．

（3）用盐酸除水垢：______．

答案

（1）氢氧化铝和盐酸反应生成氯化铝和水，故答案为：Al（OH）3+3HCl═AlCl3+3H2O；

（2）氢氧化钠和二氧化碳反应生成碳酸钠和水，故答案为：2NaOH+CO2═Na2CO3+H2O；

（3）碳酸钙和盐酸反应生成氯化钙、水和二氧化碳，故答案为：CaCO3+2HCl=CaCl2+H2O+CO2↑．

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完形填空。

     A little boy invited his mother to attend his school's first teacher-parent meeting. To the little boy's
surprise, she said she would go. This would be the first time that his classmates and teacher    1    his
mother and he felt ashamed (羞愧) of her    2   . Although she was a beautiful woman, there was a scar
(疤痕) that covered nearly the right side of her face. The boy never wanted to know about why or how
she got the scar.
     At the meeting, the people were     3    by the kindness and natural beauty of his mother though she
had the scar, but the little boy was still    4    and hid himself from everyone,    5    a conversation
between his mother and the teacher.
    The teacher asked carefully, "How did you get the scar on your face?"
    The mother answered, "When my son was a baby, he was in a room that caught fire. Everyone was
too afraid to go in because the fire was so big, so I went in. As I was running to his bed. I saw a piece
of wood    6    down and I placed myself over him trying to protect him. I was knocked down but    7   ,
a fireman came in and saved both of us." She touched the    8    side of her face. "This scar will be
lasting (持久的), but to this day, I have never regretted (后悔) what I did."
    At this point, the little boy came out    9    to his mother with tears in his eyes. He held her mother in
his arms and realized a great sense of the sacrifice (牺牲) that his mother had made for him. He held her
hand tightly for the   10   of the day.

( )1．A. looked     
( )2．A. look       
( )3．A. impressed 
( )4．A. surprised 
( )5．A. listening to
( )6．A. come       
( )7．A. surely      
( )8．A. left       
( )9．A. ran       
( )10．A. others      		B. found       
B. face       
B. surprised   
B. cool       
B. looking at 
B. coming       
B. hopefully     
B. crying     
B. run         
B. other      		C. received    
C. clothes      
C. excited      
C. happy      
C. hearing      
C. to come       
C. luckily      
C. laughing    
C. to running  
C. else       		D. met       
D. smile     
D. pleased   
D. frustrated
D. watching  
D. comes                         
D. unluckily 
D. burned    
D. running   
D. rest      
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问答题 案例分析题

【背景资料】

某新建办公大楼的招标文件写明：承包范围是土建工程、水电及设备安装工程、装饰装修工程；采用固定总价方式投标，风险范围内价格不作调整，但中央空调设备暂按120万元报价；质量标准为合格，并要求创省优质工程奖，但未写明奖罚标；合同采用《建设工程施工合同（示范文本）》GF一2013—0201。

某施工单位以3260万元中标后，与发包方按招标文件和中标人的投标文件签订了合同。合同中还写明：发包方在应付款中扣留合同额5%，即163万元作为质量履约保证金，若工程达不到国家质量验收标准，该质量履约保证金不再返还；逾期竣工违约金每天1万元；暂估价设备经发承包双方认质认价后，由承包人采购。

合同履行过程中发生了如下事件：

事件1：主体结构施工过程中发生了多次设计变更，承包人在编制的竣工结算书中提出设计变更实际增加费用共计70万元，但发包方不同意该设计变更增加费。

事件2：中央空调设备经比选后，承包方按照发包方确认的价格与设备供应商签订了80万元采购合同。在竣工结算时，承包方按投标报价120万元编制结算书，而发包方只同意按实际采购价80万元进行结算。双方为此发生争议。

事件3：办公楼工程经四方竣工验收质量为合格，但未获得省优质工程奖。发包方要没收163万元质量保证金，承包人表示反对。

事件4：办公楼工程实际竣工日期比合同工期拖延了10d，发包人要求承包人承担违约金10万元。承包人认为工期拖延是设计变更造成的，工期应顺延，拒绝支付违约金。

中央空调设备在结算时应以投标价120万元，还是以实际采购价80万元为准？说明理由。
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