第5部分:补全短文(第46~50题,每题2分,共10分)
下面的短文有5处空白,短文后有6个句子,其中5个取自短文,请根据短文内容将其分别放回原有位置,以恢复文章原貌。
A.High sound of 150 decibels can kill a healthy rat.
B.The vibration of air can produce infrasonic waves.
C.We cannot play high—pitched music with ordinary musical instruments.
D.If the intensity of infrasonic wave exceeds 160 decibels,it is extremely harmful.
E.Dolphins,whales and bats can make such high—frequency sound.
F.Therefore,the sound of Ordinary music alinstruments cannot harm your health.