Give a brief answer to each of the following question in English.Briefly introduce Blake’s Songs of Innocence and Songs of Experience.
A. SONGS OF INNOCENCE IS A LOVELY VOLUME OF POEMS, PRESENTING A HAPPY AND INNOCENT WORLD, THOUGH NOT WITHOUT ITS EVILS；
B. SONGS OF EXPERIENCE, PAINTS A DIFFERENT WORLD, A WORLD OF MISERY, DISEASE, WAR AND REPRESSION WITH MELANCHOLY TONE;
C. THE TWO BOOKS HOLD THE SIMILAR SUBJECT - MATTER, BUT THE TONE, EMPHASIS AND CONCLUSION DIFFER. 
