We　present　an　alternative　scheme　for　preparing　the　superpositions　of　coherent　states　along　a　straight　line　of　a　cavity　field　using　degenerate　atom-cavity　field　Raman　interaction.　In　the　scheme,　a　collection　of　Lambda-type　three-level　atoms　is　orderly　sent　through　the　cavity　to　interact　with　the　cavity　field　adjusted　by　a　microwave　source　connected　to　it,　followed　by　state-selective　measurements.　In　this　way,　we　can　prepare　the　superpositions　of　several　coherent　states　along　a　straight　line　with　arbitrary　weighting　factors　for　the　cavity　field.　In　the　scheme,　the　coherence　of　the　atom-cavity　system　may　be　maintained　and　the　second　microwave　field　is　unnecessary,　which　is　prior　to　the　previous　scheme.