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A、Staff who specialize in heating loss have been hired. B、The noise made by the traffic near the center has become worse. C、An i
A、Staff who specialize in heating loss have been hired. B、The noise made by the traffic near the center has become worse. C、An i
admin
2010-05-26
33
问题
I am glad to see so many of you here. We’ve become really alarmed over at the health center by the number of students we are seeing, who are experiencing heating loss. First I want to go over some basics about hearing, then we can take a look at our school environment and see if we can figure out some ways to protect hearing. The leading cause of preventable heating loss is excessive noise. Too much moderate noise for a long time, or some types of intense noise for even a short time can damage hearing. Loudness is measured in units called decibels. One decibel is the lowest sound that the average person can hear. Sounds up to 80 decibels generally aren’t harmful, that’s noise like traffic on a busy street. But anything louder than 80 decibels, esp. with continuous exposure, may eventually hurt your hearing. Once you’re up to around 140 decibels, that’s like a jet plane taking off, then you might even feel pain in your ears. And pains are sure sign that your hearing is at risk. Even one exposure to a really loud noise at close range can cause hearing loss. So what you need to do is limit your exposure to harmful levels. If you pass along this hand-out, we can take a look at the decibel level of some common campus sounds. Notice how loud those horns are that people take to football games. They are really dangerous if blown fight behind you. Now, let’ s try to generate a list of damaging noises.
选项
A、Staff who specialize in heating loss have been hired.
B、The noise made by the traffic near the center has become worse.
C、An increase in patients with hearing problems has been noticed.
D、A course to introduce students to medical careers has been set UP’
答案
C
解析
细节题。文章一开始就谈到...We’ve become really alarmed over the health center by the number of students we are seeing,who are experiencing heating loss,之所以震惊是因为我们所看到的经历听觉受损的人中学生数量之大令人吃惊。
转载请注明原文地址:https://jikaoti.com/ti/oALFFFFM
0
大学英语四级
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