旋转式钻眼破岩原理是什么?

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问题:

旋转式钻眼破岩原理是什么?

考点:井巷工程井巷工程题库
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孕妇小腿抽筋是因为缺少()。

A、铁

B、钙

C、锌

D、维生素

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单句改错(共10小题,每小题1 分,共计10分)

小题1: Dad is coming back from abroad. What presents do you think will he bring to us?   1. __________

小题2: He mustn’t have gone far, because his coat is still here on his chair.              2. __________

小题3:According to a widely accepted theory, the universe began with a “Big Bang” that threw matters in all directions. 3. ___________

小题4:We are advised to wear sunglasses to prevent our eyes from the strong sunlight.    4. ___________

小题5:We won’t have Jim get away with cheating in the exam. 5. ___________

小题6:I have told him about the get-together but if he will come I don’t know. 6. ___________

小题7:He told us that it would be a great chance to build our bodies and we would have a wonderful time in it.  7. __________

小题8: Dressed in a bright red dress, she was easy to be picked out in the big crowd.       8. __________

小题9:She said that she might not come, so it is no point waiting for her here.            9. __________

小题10: After they moved in, she decided to change the curtains because they did not fit the wall and the furniture.  10. __________

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伊壁鸠鲁认为快乐就是(),并以鲜明的一贯性坚持这种观点。

A、德

B、品

C、善

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真性室壁瘤

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宣告失踪:是指自然人离开自己的住所,下落不明达到法定期限2年,经利害关系人申请,由人民法院宣告其为失踪人的法律制度。
下列选项中。人民法院不能对其宣告失踪的是( )。

A.渔民李某出海打鱼一去不返,下落不明2年后,其妻子向法院申请李某失踪
B.张某离开家乡,出外打工,其家人因5年内无其音讯向法院申请张某失踪
C.田某在一次洪水灾害中下落不明,3年后,其家人向法院申请田某失踪
D.宫某因工作出差,2年后其患有间歇性精神病的邻居向法院申请宫某失踪

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