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酸雨的pH值小于_________,主要是____________造成的。

【参考答案】

5.6 人为地向大气中排放大量酸性物质。
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完形填空。 The night was dark, though sometimes the moving clouds allowed a star or two to be seen in the sky. The poor men held on to any bit of wood they could finD. They called to the Marie (圣母玛丽亚) for _1_, but she was far _2_ the reach of the human voicE. At one o'clock in the morning, the water was getting _3_ , and a strong _4_ had begun to blow. Suddenly _5_ were seen in the distance; another ship! The shouts of the swimmers were heard on board, and willing hands pulled them out of the water. The _6_ of the ship that had so _7_arrived on the scene in time to save their lives was Ellen. Whathad brought her to the exact spot through the _8_ and the pathless sea? Her captain had known _9_ about the wreck (沉船) and had indeed attempted to sail away from it. But let him speak for himselF. 'I was forced by the wind,' he said long afterwards, 'to _10_ my course (航道). Just as I did it, a small _11_ flew across the ship once or twice and then _12_ at my facE. I took _13_ of this until exactly the same thing happened at a_14_ time, which caused me to think it rather _15_ , while I wasthus _16_ it, the same bird for the third time, made its appearance and flew_17_ in the same way as beforE. I was then _18_ to change my course back to the original (原来的) onE. I had not gone far _19_ I heard strange noises; and when I tried to_20_ where they came from, I found I was in the middle of people who had been shipwrecked (船只失事). I immediately did my best to save them.' ( )1. A. food ( )2. A. between ( )3. A. colder ( )4. A. smoke ( )5. A. people ( )6. A. name ( )7. A. slowly ( )8. A. light ( )9. A. everything ( )10.A. continue ( )11.A. light ( )12.A. flew ( )13.A. no care ( )14.A. good ( )15.A. interesting ( )16.A. searching ( )17.A. back ( )18.A. decided ( )19.A. when ( )20.A. listen to B. help B. outB. deeperB. wave B. lightsB. owner B. early B. wind B. nothing B. turn B. fish B. stopped B. good care B. second B. funny B. expecting B. about B. advised B. while B. search for C. rest C. beyond C. saltier C. sand C. ships C. captain C. immediately C. darkness C. something C. change C. plane C. stayed C. no notice C. third C. common C. considering C. up C. persuaded C. as C. make sure D. stop D. in D. warmer D. wind D. houses D. person D. fortunately D. water D. anything D. sail D. bird D. looked D. some notice D. long D. unusual D. hearing D. down D. invited D. after D. look out
A. They called to the Marie (圣母玛丽亚) for 
_1_, but she was far  _2_  the reach of the human voicE. At one o'clock in the morning, the water was 
getting  _3_ , and a strong  _4_  had begun to blow. Suddenly  _5_ were seen in the distance; another 
ship! The shouts of the swimmers were heard on board, and willing hands pulled them out of the water. 
The  _6_  of the ship that had so  _7_   arrived on the scene in time to save their lives was Ellen. What
had brought her to the exact spot through the  _8_  and the pathless sea? Her captain had known  _9
about the wreck (沉船) and had indeed attempted to sail away from it. But let him speak for himselF.
B. Just as I did it, 
a small  _11_  flew across the ship once or twice and then  _12_  at my facE. I took  _13_  of this until 
exactly the same thing happened at a   _14_  time, which caused me to think it rather  _15_ , while I was
thus  _16_  it, the same bird for the third time, made its appearance and flew   _17_ in the same way as 
beforE. I was then  _18_  to change my course back to the original (原来的) onE. I had not gone far  
_19_  I heard strange noises; and when I tried to   _20_  where they came from, I found I was in the 
middle of people who had been shipwrecked (船只失事). I immediately did my best to save them.'
C. A. food     
D. A. between  
E. A. colder  
F. A. smoke   
G. A. people     
H. A. name    
I. A. slowly   
J. A. light    
K. A. everything 
(     )10.A. continue  
L.A. light     
M.A. flew     
N.A. no care   
O.A. good    
P.A. interesting
Q.A. searching  
R.A. back     
S.A. decided  
T.A. when     
U.A. listen to  
V. help      
W. out     
X. deeper    
Y. wave     
Z. lights    
[. owner   
. early   
]. wind     
^. nothing  
_. turn     
`. fish     
A. stopped  
B. good care 
C. second   
D. funny    
E. expecting
F. about     
g. advised   
h. while     
i. search for
j. rest       
k. beyond   
l. saltier    
m. sand       
n. ships      
o. captain    
p. immediately
q. darkness   
r. something  
s. change     
t. plane      
u. stayed     
v. no notice  
w. third      
x. common    
y. considering
z. up         
{. persuaded  
|. as         
}. make sure  
~. stop       
. in         
€. warmer     
. wind       
‚. houses     
ƒ. person     
„. fortunately
…. water      
†. anything   
‡. sail       
ˆ. bird       
‰. looked     
Š. some notice
‹. long       
Œ. unusual    
. hearing    
Ž. down       
. invited    
. after      
‘. look out   
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完形填空。 The story tell us about the British writer, Richard SavagE. He was once living in London with_ 1_ money in his pockets. In order to get some food and clothes he wrote the story of his life and managed to have it _2__ .But not many copies of his books were __3_ in the shops, and he was still living a hard lifE. Because of anxiety and malnutrition, he became very weak and before long fell _ 4_ ,and a doctor was sent for. The doctor was not rich enough, but __5_ literaturE. He tried his best to cure Savage of his illness and a week later Savage was out of __6_ When he finally recovered his __7_ , the doctor sent a bill to Savage for his __8_ ,but poor Savage had no money to __9_ it. The doctor waited for a month and sent another bill. __10_ no money again, the doctor went to Savage himselF.' You know you __11_ your life to me,' said the doctor, 'and I should _12__ some thankfulness from you.' 'I __13_ ,' said the writer, ' you've done a great favour for me and to __14_ that I'm not ungrateful for your kindness, I'll __15_ my life to you.' With these _16__ he handed the doctor two copies of The Life of Richard SavagE.The doctor took the books home and began to __17_ them carefully. 'I see I've _18__ the life of a great writer,' the doctor said to himself with a sense of pridE. ' Maybe this is the only thing I could be really __19_ in my lifE.' Five years later Savage called on the doctor to pay his bill, only to find that the doctor had already _20__. ( )1.A.much ( )2.A.published ( )3.A.bought ( )4.A.weak ( )5.A.was interested in ( )6.A.safety ( )7.A.sight ( )8.A.care ( )9.A.pay ( )10.A.Receiving ( )11.A.promise ( )12.A.wish ( )13.A.refuse ( )14.A.explain ( )15.A.offer ( )16.A.words ( )17.A.write ( )18.A.made ( )19.A.fond of ( )20.A.passed away B. a little B. found B. sold B. anxious B. was familiar with B. power B. health B. aid B. supply B. Received B. return B. choose B. agree B. prove B. contribute B. drills B. correct B. saved B. famous for B. escaped C. little C. encourage C. printed C. frightened C. was popular with C. danger C. movement C. a ttention C. afford C. KeepingC. lend C. get C. warn C. describe C. give C. compositions C. improve C. trained C. proud of C. hurried off D. enough D. protected D. showed D. ill D. struggled against D. injury D. action D. treatment D. allow D. Kept D. owe D. master D. suppose D. plan D. damage D. collections D. read D. taught D. worried about D. run away
A. He was once living in London with_  
B. In order to get some food and clothes he wrote the story of his life and 
managed
C.But not many copies of his books were __3_  in the shops, and he was 
still living a
D. Because of anxiety and malnutrition, he became very weak and before long 
fell _
E. The doctor was not rich enough, but  __5_ literaturE. He tried his 
best to cure Savage of his
F. 
The doctor waited for a
G.  __10_ no money again, the doctor went to Savage 
himselF.
H.' 
    
I.'
J. ' Maybe this is
K.'
L.A.M.A.N.A.O.A.P.A.Q.A.R.A.S.A.T.A.U.A.V.A.W.A.X.A.Y.A.Z.A.[.A..A.].A.^.A._.A.`. a little         
A. found            
B. sold             
C. anxious          
D. was familiar with
E. power            
F. health           
g. aid              
h. supply           
i. Received         
j. return           
k. choose           
l. agree            
m. prove            
n. contribute       
o. drills           
p. correct          
q. saved            
r. famous for       
s. escaped          
t. little          
u. encourage       
v. printed         
w. frightened      
x. was popular with
y. danger          
z. movement        
{. a ttention      
|. afford          
}. Keeping         
C. lend            
~. get             
. warn            
€. describe        
. give            
‚. compositions    
ƒ. improve         
„. trained         
…. proud of        
†. hurried off     
‡. enough             
ˆ. protected          
‰. showed             
Š. ill                
‹. struggled against  
Œ. injury             
. action             
Ž. treatment          
. allow              
. Kept               
‘. owe                
’. master             
“. suppose            
”. plan               
•. damage             
–. collections        
—. read               
˜. taught             
™. worried about      
š. run away