问题
单项选择题
采煤机截割功率大于550KW空运转时要求噪声不大于（）dB。
A、95
B、85
C、90
D、98
答案
参考答案：A
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采煤机截割功率大于550KW空运转时要求噪声不大于（）dB。
A、95
B、85
C、90
D、98
参考答案：A
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| Dear Zhou Jun, Thank you for your letter. It's great to 1 you again. How's your study? I hope you can 2 all your exams to get into a high school. When I got your last letter, I was very 3 volunteering (志愿活动) in Ghana. So I had no time to write back. I just got back home last week. I've got so much to 4 you! It was my first time to be a volunteer. I 5 two months there, teaching in a very poor school. When I arrived, there were only six classes and three 6 ! I had my own 7 . There were twenty children in it. I could teach them anything I wanted. They love me very much. I was so 8 in Ghana. I slept in the same house with some of the children in my class. That was a (an) 9 experience for me! I'd love to 10 to Ghana in a few months to see them again. Well, good luck with your exams! Ben | ||||
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