Loud noises can be irritating.

单选题

Loud noises can be irritating.

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材料题

rns to normal.Permanent hearing loss can happen when someone is exposed to loud noise ________(9)and over. Construction workers and people who work in factories must ________(10)ear protectors because the equipment they use can be extremely loud. But even some lawn mowers（割草机）and power tools can permanently__________ (11)a persons ability to hear high-pitched noises and can also give him permanent tinnitus. Listening to extremely loud music over and over can also have the same effect on a perso

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单选题

A LAVATORY CAN BE ISOLATED:

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