问题 选择题

下列说法中正确的是(  )

A.乐音就是乐器发出的声音,它不可能是噪声

B.打开门窗,加快空气的流动,可以减弱马路上的噪声

C.噪声可以影响人们的休息和学习,但不会影响健康

D.植树造林可以保护环境,减弱噪音

答案

A、从环保的角度说,凡是影响人们正常工作或休息等的声音,都属于噪声,因此乐音有时候也可能是噪声.故本选项说法错误.

B、打开门窗,加快空气的流动,但不可以减弱马路上的噪声;故本选项说法错误.

C、噪声可以影响人们的休息和学习,同样会影响健康;故本选项说法错误.

D、植树造林可以在传播过程中减弱噪声,因此在马路边种植花草树木可以减弱噪声,故本选项说法正确.

故选D.

完形填空
完形填空。
     Who designed (设计) the first helicopter (直升飞机)? Who  1  of the most famous pictures in the world?
Who knew more about the human body than most  2 ? There is an answer  3  all. these questions -Leonardo
de Vinci (达·芬奇).
     Leonardo may have been the greatest genius (天才)  4  have ever known. He lived in Italy around the year
1500, but many of his inventions seem modern to us today. For example, one of his notebooks has drawings
of a helicopter. Of course, he couldn't  5  a helicopter with the things he had.
     But scientists say his idea would have worked. But Leonardo  6  an inventor. He was one of the greatest
artists of his day. By the time he was twenty years old, he was called a master (大师) painter, and as he got
older he became  7  more famous. Sometimes he drew a hand ten different ways  8  he was ready to paint.
     Many of Leonardo's wonderful paintings are still with  9  today. You may know one of his most famous
works the  10  woman known as the Mona Lisa.
( )1. A. took          
( )2. A. artists       
( )3. A. to            
( )4. A. the scientists
( )5. A. draw          
( )6. A. was just      
( )7. A. less          
( )8. A. before        
( )9. A. him           
( )10. A. interesting  
B. made      
B. doctors   
B. of        
B. the artists
B. paint     
B. wasn't just
B. no        
B. after     
B. us        
B. crying    
C. painted 
C. painters
C. for     
C. the world
C. work    
C. wasn't  
C. even    
C. because 
C. them    
C. smiling 
D. invented    
D. people      
D. from        
D. people      
D. build       
D. was no longer
D. very        
D. when        
D. you                                        
D. surprising  
单项选择题