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201197-26.Think about the advantages and disadvantages of each form. 27.Think about23.Most of the miners were rescued from the coal mines there

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2012521-Recently the newspapers have report several ___ of the coal mines happeningB. To tell about advantages and disadvantages of making friend

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2015322-Aquifers, salt cavities and man made reservoirs (such as disused coal minesThere are advantages and disadvantages in each type of undergr

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(Spontaneous combustion of coal), advantages and disadvantages of the current used There are more than 56% of mines in our country

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201371-04.The Advantages and Disadvantages of Surfing the Internet ? : such as the 20 4 coal mines or oil fuels, etc

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