A dormitory at the university is a mixed type dormitory, among which some male students are living in several departments. Every night there will be a recital to give a high opinion on a certain issue.
  Chinese Department a: “Love is like Venus, only the incomplete is beautiful enough.”
   Physics Department b: “Love is the poles of yin and yang, only collision can produce sparks.”
  Chemistry Department c: “Love is like acid and alkali, and only by finding the best ratio can it be neutralized.”
  The history department is small d:”Love is a historical story, only bystanders can see clearly.”
  Philosophy department e: “Love is the dialectical unity of reason and romance.”
   Music Department f: “Love is a song, and one can sing and reconcile its harmony and moving melody.”
  Only the mathematics department g has been silent. Everyone asked urgently, Xiao g replied aloud: “Without a career as a foundation, 1+1=0.”
   Everyone was amazed.