第1个回答 2009-06-30
1, Dictionary of natural gas is generally defined as: "production in oil fields, coal fields and marshes of the combustible gases," the main ingredient for methane.
2、水和油在成分和性质方面有天壤之别。 2, water and oil in the ingredients and have a different nature.
3、准确确定出打井的位置是油井高产的关键。 3, to accurately determine the location of the wells is the key to high-yield oil wells.本回答被提问者采纳
第2个回答 2009-06-30
1, Dictionary of natural gas is generally defined as: "production in oil fields, coal fields and marshes of the combustible gases," the main ingredient for methane.
2, water and oil in the ingredients and have a different nature.
3, to accurately determine the location of the wells is the key to high-yield oil wells
第3个回答 2009-07-01
方寸间，历数世上桑田沧海；时空里，细问人间暑往寒来；是朋友，星移斗转情不改；是知音，天涯海角记心怀。