题目内容
矿山安全技术
本部分共10小题，每小题1分。每题的备选项中只有一个最符合题意。
采用充填采矿法回采矿石时，要用充填材料充填回采空间，实现采场地压控制。充填体的作用是()。
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为防止乙炔生产装置产生的乙炔发生爆炸，乙炔生产装置应安装()等安全装置。
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Task 1
Directions: After reading the following passage, you will find 5 questions or unfinished statements, numbered 36 through 40. For each question or statement there are 4 choices marked A, B, C, and D. You should make the correct choice.
As more women in the United States move up the professional ladder, more are finding it necessary to make business trips alone. Since this is new for many, some tips(建议)are certainly in order.
If you are married, it is a good idea to encourage your
Who is the author's intended audience？ ______
5，11，28，53，126，（）
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