题目内容
Underground water supplies about______.
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听力原文： During the past decade, there has been a big increase in violence crimes throughout the world. (29)Not only has there been a frightening increase in murders and rapes, but chances of being attacked and robbed have grown so that the elderly avoid leaving their apartments. The exact cause of this horrifying development has not been found. (30)Some sociologists feel that the growth of crime on TV is related with the growth of violence on going to be blown up, why not enjoy yourself fully! Regardless of the cause or causes, a fundamental change in about their fellow human beings. (31) Today, people have become "I-centered." They are more interested in tragic changes in our morality and social ways. Until people once more learn to replace "I" with "we". We shall continue to move toward destructive self-centeredness.
(30)
SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： We've become really alarmed over the health center by the number of students we are seeing, who are experiencing hearing 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 hearing 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 8O decibels generally aren't harmful. That's noise like traffic on a busy street. But any- thing louder than 80 decibels may eventually hurt your hearing. Once sounds are up to around 140 decibels, that's like a jet plane taking off, then you might feel pain in your ears. And pains are sure sign that your hearing's 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 handout, 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 right behind you. Now, let's try to generate a list of damaging noises.
What is this passage talking about？
Many people in Russia become crackers and hackers mainly because of ______.
A．People can find more pleasures in violence.B．People think the world will one day end
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