问题
判断题
噪声的来源主有交通噪声、工业噪声、建筑施工噪声和社会噪声。人耳开始感到疼痛的声音叫做痛阈，其声级为120分贝（dB）左右。（）
答案
参考答案：对
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噪声的来源主有交通噪声、工业噪声、建筑施工噪声和社会噪声。人耳开始感到疼痛的声音叫做痛阈，其声级为120分贝（dB）左右。（）
参考答案：对
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| When Roy was four years old, his father 1 in an accident, leaving his mother and him. After Roy left high school, he wanted 2 to a good college in his hometown. But his mother would pay 3 money for his college education. "I'll try to do something for you as soon as you pass the entrance exam," said his mother. Roy took the exam. As a result, he could enter the college 4 he didn't get very high scores. His mother was very excited, but she knew quite a lot of money would be needed. The next day, she sold her car and asked her boss 5 another four hours' work every day. She even had two jobs, one during the day and 6 at night. She had to walk to work and work twelve hours a day, seven days a week, but she didn't 7 . She thought her son's education was worth (值) so much. A term passed. Roy took his first exam after entering the college. When the results were told, Roy ran home to 8 his mother the news. "Mum," he said. "I've got my exam results. You must be very 9 ." "You mean you've passed?" she asked happily. "No, I haven't. You can get your car back and stop 10 like that from now on." | ||||
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