问题 填空题

温室效应已引起全球广泛关注,某校研究小组的同学为了研究空气中CO2含量对空气温度的影响,进行了下列实验:

实验一制取研究所需的CO2气体.实验室可用下列A、B装置制取CO2

(1)写出装置中a、b仪器的名称:a______,b______;

(2)与A装置相比较,B装置的优点是______.

实验二探究白炽灯光照条件下空气中CO2含量对空气温度的影响.

步骤1:用5个规格相同的塑料矿泉水瓶分别收集1瓶空气、1瓶CO2以及3瓶空气和CO2的混合气体(CO2含量分别为10%、20%、30%),并用带温度计的胶塞塞紧瓶口;

步骤2:把上述装有气体的矿泉水瓶放到白炽灯下照射,每隔1分钟记录一次温度.

实验数据如下表:

时间/min

温度/℃

CO2含量

起始12345
全部空气23.023.323.924.625.025.5
10%23.023.524.225.026.027.0
20%23.024.024.525.626.527.5
30%23.024.525.026.227.529.0
100%23.030.033.035.637.039.5
回答下列问题:

(1)仔细分析表中数据,该实验可以得出的结论是;

①______;②______.

(2)根据本次活动的上述数据推测,在相同条件下,当CO2含量为25%时温度达到25.4℃需要的时间范围为______min.

(3)“节能减排,从我做起”,请写出你会做到的两点节能减排具体做法______;______.

答案

实验一(1)试管和长颈漏斗都是初中化学实验中常用的仪器,故(1)答案:试管;长颈漏斗

(2)比A多用到了长颈漏斗目的就是为了酸不够用时再简单快速的添加酸,故(2)答案:可随时向锥形瓶内添加酸液

实验二

(1)①分析表中数据纵向比较可知温度数据从上到下越来越大,即在同一时间内CO2含量越高,温度升高的越高.故①答案:在同一时间内CO2含量越高,温度升高的越高

②分析表中数据横向比较数据越来越大,即在同一CO2含量的条件下,随着时间的推移,温度逐渐升高.故②答案:在同一CO2含量的条件下,随着时间的推移,温度逐渐升高.

(2)根据表中数据二氧化碳含量是20%时,时间经过二分钟后温度变为24.5℃,时间,经过三分钟温度升高到25.6℃,二氧化碳含量是30%时,时间二分钟后温度变为25.0℃,时间,过三分钟温度升高到26.2℃.二氧化碳含量是25%温度的变化肯定介于20%到30%两种情况之间,故(2)答案:2~3

(3)想办法减少能量的消耗即可,故(3)答案:随手关灯,练习本双面使用等

完形填空
完形填空。
     When she walked in, his eyes lit up. They had both   1    someone they loved. So this day was a   2  
one. She was  3 , lonely and afraid. He knew how she felt. There was an clear  4    in his heart, too.  5  
what strengthened their love for each other was heartache.
She stood there. He motioned (示意) to her to sit next to him. She hesitated (犹豫)   6  a moment, but
gave in. In fact, she  7  did. Then she held his hand. He looked at her and placed his hand on hers.
Suddenly he reached   8    the pillow(枕头), pulled out a large  9  and nervously   10   it to her. She was
a bit in   11  .Then he handed her a small box, wrapped (包,裹) in paper of hearts and flowers. She
couldn't   12  what was happening.
     "Now,"he said, "read the card."
     She opened the envelope. It  13  as follows:
     I know that this has been a hard year for  14   of us. I know that Valentine's Day is a  15  day
for people in love. I want you to know that…
( )1. A. missed      
( )2. A. wonderful  
( )3. A. hurt        
( )4. A. disappointment
( )5. A. But        
( )6. A. in          
( )7. A. always      
( )8. A. beside      
( )9. A. box        
( )10. A. handed     
( )11. A. surprise  
( )12. A. criticise  
( )13. A. read      
( )14. A. all        
( )15. A. special    
( )16. A. turkey    
( )17. A. first      
( )18. A. Steadily  
( )19. A. word      
( )20. A. sweet      
B. forgot  
B. difficult
B. terrified
B. surprise
B. If      
B. for      
B. never    
B. into    
B. envelope
B. presented
B. peace    
B. consider
B. looked  
B. neither  
B. magic    
B. eggs    
B. last    
B. Rapidly  
B. note    
B. distinctive
C. lost    
C. magnificent
C. injured  
C. excitement
C. So      
C. at      
C. seldom  
C. under    
C. card    
C. supplied
C. silence  
C. wonder  
C. wrote    
C. both    
C. common  
C. chocolate
C. smallest
C. Happily  
C. rose    
C. vivid    
D. respected  
D. usual      
D. harmed      
D. pain        
D. While      
D. after      
D. sometimes  
D. on          
D. calendar    
D. imported    
D. fright      
D. believe    
D. seemed      
D. none        
D. formal      
D. trees      
D. best        
D. Slowly      
D. notice      
D. broken      
填空题