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【Daily Topic】【Engineering Version 20160518】

2016-05-18View Original

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Participation reward: 2 Wealth. Reward for the correct answer: 9 Wealth. When drilling a shaft or tunnel to reach an undiscovered coal seam for the first time, and in accordance with the accurate position of the drilling site relative to the coal seam provided by the geology department, drilling must begin at a distance of ( ) from the coal seam.   A. 5m  B. 8m  C. 10m  D. 15m

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