问题 填空题

2007年12月22日,沉没在苍茫海水中800多年的中国古沉船“南海一号”的“惊艳一浮”,让无数国人为之自豪,它既为海上丝绸之路提供了实证,又推动了中国水下考古学科的建设。据保守估计,其上载有6万至8万件文物,在已发掘出的文物中发现了大量瓷器、宋代铜钱、铁锅、梳篦等物品。

(1)中国的陶瓷举世闻名,陶瓷材料属于___________材料;

(2)在发掘过程中,发现有许多破碎的瓷片与淤泥混杂在一起。为使这些宝贵的文物不流失,请你设计一种可行的方法获得这些碎瓷片:_________________________________.

答案

(1)无机非金属

(2)用网眼小于碎瓷片的铁丝筐将混有淤泥的瓷片浸入水中旋转,然后取出(用类似过滤的方法即可)

完形填空
完形填空


       Now satellites are   1   to forecast (预报) the weather. They are in space, and they can   2   any
part of the world. The satellites take pictures of the atmosphere(大气) ,  3   this is where the weather
forms(形成). They send these   4   to the weather stations. So meteorologists(气象学家) can see the
weather of any part of the world. From the pictures , the scientists can often say   5   the weather will
change.    
       Today, nearly five hundred weather stations in sixty countries receive satellite pictures. When they
receive new pictures, the meteorologists compare them with earlier  6   . Perhaps they may find that the
 clouds have changed during the last few hours. This may mean that the   7   on the ground may soon
change, too . In their next weather forecast , the meteorologists can say this. So theweather satellites are
a great   8   to the meteorologists.  9   satellites were invented, the scientists could forecast the weather
for about 24 or 48 hours. Now they can make good forecasts for three or fivedays. Soon , perhaps ,
they may   10   forecast the weather for a week or more ahead(提前) .

( )1. A. help        
( )2. A. reach        
( )3. A. so          
( )4. A. satellites  
( )5. A. that        
( )6. A. it          
( )7. A. clouds      
( )8. A. report      
( )9. A. Before      
( )10.A. can          
B. to help    
B. arrive      
B. because    
B. pictures    
B. for        
B. one        
B. weather    
B. luck        
B. After      
B. be          
C. helped          
C. get              
C. even            
C. weather          
C. where            
C. ones            
C. pictures        
C. helpful          
C. Since            
C. be able to      
D. helping            
D. go                 
D. and                
D. space              
D. how                
D. them               
D. trees              
D. help               
D. If                 
D. could              
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