我在處理這段代碼時遇到了問題?；旧衔乙笥脩糨斎胍粋€問題，然后它要求用戶回答。這些都存儲在字典中。我能夠存儲問題，但是當通過輸入 #1 來回憶答案時，它會返回問題兩次。知道為什么嗎？#start title screentitle = "Frequently Asked Questions" print()  print("=" * len(title))print(title)print("=" * len(title))  print()#start menu list  menu = """ 0: Exit   1: List FAQ's  2: Add FAQ  3: Delete FAQ  """  #title for selection #1  def faq_title():       print("Frequently Asked Questions:")      print("===========================")  #empty dictionary to be filled with user input questions and answersfaq = {}done = Falsewhile not done:     print(menu)      #enter a choice number      selection = input("Please enter a choice: ")      print()     # if user enters #0 then quits     if selection == "0":          done = True     #if user enters #1, gets list from dictionary named "faq"      elif selection == "1":           faq_title()          for question in faq:             print("Question: {}".format(question))          for answer in faq:              print("Answer: {}".format(answer))  #if user enters #2, user enters a question and then an answer which is to be stored into "faq" dictionary  #user can add as many Q&A as they want to be stored in "faq" dictionary     elif selection == "2":          question = input("Please enter the question: ")          answer = input("Please enter the answer: ")         if question in faq:             print('That question is already listed. Enter another question.')         else:              faq[question] = answer              print('Has been added to the dictionary.')      #if user enter #3, user enters a question to be deleted from the list.     #if list is empty or not in list, then return could not find      elif selection == "3":          delete = input("Please enter the question to be deleted:")          if delete in faq:              del faq[question]          if delete not in faq:              print("Could not find {} in the FAQ's:".format(delete))             print("No changes made")  print("Done!")