问题
单项选择题
大流量安全阀的作用是在工作面顶板来压（）强烈时，使立柱活塞腔急速储存的能量迅速释放出来，避免立柱及支架部件的损坏。
A、不
B、较
C、一般
D、极
答案
参考答案：D
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大流量安全阀的作用是在工作面顶板来压（）强烈时，使立柱活塞腔急速储存的能量迅速释放出来，避免立柱及支架部件的损坏。
A、不
B、较
C、一般
D、极
参考答案：D
When I was twenty-eight, I left my hometown and went to another city. There I found my first . I worked a dentist in a hospital.. It was cloudy yesterday .When I was to go home ,it started to rain. Then I found I to take my umbrella. So I ran to the quickly. When I reached there, , my clothes were all . It got colder and colder. I for about half an hour, but there weren’t any buses coming. Just then a car behind me. The woman in the car rolled（滚动）down the window and asked if I a ride. I remembered my mother told not to take rides from strangers（陌生人）. So I said , “No, thanks.” she still asked me to get into her car . I looked at her and she looked like a kind woman . So I in and she took me all the way to my house . I thanked her and wanted to her some money . She refused (拒绝) and went off before I ask for her name . I was really lucky to meet such a kind woman in the strange city.
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