A、The maximum noise that our human ears can put up with is 140 decibels. B、It is advisable to listen to some rock music when an

Question No. 6 Over fifty years ago books were among the cheapest things you could buy and the expenditure of a dollar or two at Christmas solved all your gift problems.

Question No. 8 Listening to noise above 140 decibels, such as a jet taking off close by, can result in hearing loss. The same is true with listening to a live rock concert once or twice a week.