YOU ( ) USE EAR PROTECTION WHEN YOU ARE NEAR AN ENGINE THAT IS IN OPERATION.

单选题

YOU ( ) USE EAR PROTECTION WHEN YOU ARE NEAR AN ENGINE THAT IS IN OPERATION.

答案解析

单选题

Use a handkerchief if you need to____.

答案解析

单选题

You can use them _______ you work here.

答案解析

材料题

is smaller than the tip of my little finger and its almost invisible when worn. There are no wires,no behind-the-ear device. Put it in your ear and its ready-to-wear mold（形状）fits comfortably. Since its not too loud or too tight, you may even forget that you,re wearing it!Use it at work or at play.And if your hearing problem is worse in certain situations,use Crystal Ear only when you need it.Hearing loss,which occurs typically prior to teenage years,progresses throughout ones lifetime.Although

答案解析

材料题

is smaller than the tip of my little finger and its almost invisible when worn. There are no wires,no behind-the-ear device. Put it in your ear and its ready-to-wear mold（形状）fits comfortably. Since its not too loud or too tight, you may even forget that you,re wearing it!Use it at work or at play.And if your hearing problem is worse in certain situations,use Crystal Ear only when you need it.Hearing loss,which occurs typically prior to teenage years,progresses throughout ones lifetime.Although

答案解析