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  3. An American researcher has developed a simple device to help people stop snoring. The device restricts the movements of the tiss

An American researcher has developed a simple device to help people stop snoring. The device restricts the movements of the tiss

admin2021-11-11  15
问题     An American researcher has developed a simple device to help people stop snoring. The device restricts the movements of the tissue that caused the disliked sound. Snoring is a common problem. It may prevent a person from getting enough sleep. It may also prevent enough oxygen from reaching the heart and lungs during sleep. But for most people, snoring affects relations with the other person who must sleep in the same room.
    Snoring happens when the sleeping person breathes with the mouth open. In the back of the mouth the tissues surrounding the entrance of the throat are soft. As the person breathes, the movement of the air around the soft tissues causes them to move. This tissue movement causes the sound we call snoring. A number of possible solutions have been proposed. Some devices keep the mouth shut. They force the patient to breathe only through the nose. A medical operation is also possible. Other devices listen for the sound of snoring and then wake the patient. The new anti-snoring device was developed by a dentist, George Wagner of the Indiana University School of Dentistry. He developed a piece of plastic that fits up against the inside of the mouth. The device keeps the soft tissues from vibrating and making the snoring noise. It was worn only at night. Doctor Wagner said several patients report that the simple device has ended their snoring problem.
How many possible solutions to snoring have been proposed in the passage?
选项 A、One
B、Two
C、Three
D、Four
答案D
解析
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