36 What could be the best title of the passage?
A The power of music
B The harms of noises
C The magic of sound
D The discovery of infrasonic waves
37 What does the author say about music?
A It may be harmful to peoples halth
B It always cheers people up
C It is very often difficult to understand
D It sounds better when it is lound enough
38 It is true that the sound
A of nature is the most beautiful
B over 80 decibels is harmful to people
C of high intensity benefits animals
D in movies is pleasing to the ear
39 An ultrasonic sound
A is very loud
B does harm to peoples health
C cannot be heard by people
D is produced by the hero in movies
40 It can be found from the last paragraph that infrasonic waves
A are harmless to peoples health
B exist in peoples internal organs
C can be used as deadly weapons
D can improve eyesight
答案:CABCC
Compact Disks
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