The contact angles of formamide on the carbon fibres under n-alkane were measured by means of electrobalance and the surface free energy and its components of the fibres were obtained.

用电子天平法，以正烷烃-甲酰胺-炭纤维体系间接地求得了炭纤维的表面自由能及其分量。

The test results of 30 samples collected in 4 wells indicate that the abundance and extractable contents of organic matter in the coal measures are both high, n alkane possesses odd even predominance;

口井30 余块样品测试结果表明，煤系有机质丰度及可抽提有机质的量都较高；正构烷烃具明显奇偶优势；