试题与答案

学校买回4个篮球和5个排球一共用185元，一个篮球比一个排球贵8元，篮球的单价是

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题型：选择题

题目：

学校买回4个篮球和5个排球一共用185元，一个篮球比一个排球贵8元，篮球的单价是（　　）元．
A．17B．20C．25

答案：

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下面是错误答案，用来干扰机器的。

25×12.5×1.2÷[3.14×（）2×100]≈83（分钟）

考点：列方程解决问题
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      When people talk about air pollution, they are usually thinking about outdoor air  1 . But do you know
that there is also air pollution inside homes, offices, hotels and other buildings? The air in your home can be
2 to 100 times more polluted than the air outdoors! In fact, some American doctors say that 50% of illnesses
have  2  to do with polluted indoor air.
     A lot of pollution comes from indoor activities  3  smoking and cooking. As most people  4  about 80-90%
of their time inside buildings, it is important to take indoor air pollution seriously, too.
     Air pollution influences our health  5 . When the air is polluted, not only young children and old people
suffer from (遭受) it,  6  people with health problems suffer as well. Indoor air pollution can  7  people's eyes,
noses and throats. Air pollution, both indoor and outdoor, can also lead to lung cancer (肺癌) and heart disease!
In the great London fog in 1952, 4,000 people died in a few days  8  the pollution! It is said that half a million
young children and women die each year in India because of indoor air pollution!
( )1. A. pollution   
( )2. A. nothing     
( )3. A. as well as  
( )4. A. take        
( )5. A. in many ways
( )6. A. and         
( )7. A. hit         
( )8. A. because of   		B. pollute       
B. everything    
B. such as       
B. cost          
B. in many things
B. but           
B. hurt           
B. thanks to      		C. polluting    
C. something    
C. instead of   
C. spend        
C. in many houses
C. or                                                   
C. polluted     
C. related to   
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