4、　　某银行营业厅共有6个营业窗口，设有排队系统广播叫号，该银行的业务分为公积金、银行卡、理财卡等三种。公积金业务指定1号窗口，银行卡业务指定2、3、4号窗口，理财卡业务指定5、6号窗口。但如果5、6号窗口全忙，而2、3、4号窗口有空闲时，理财卡业务也可以在空闲的2、3、4号窗口之一办理-4, a bank operating room a total of six operating window, with radio call number queuing system, the bank' s business is divided into provident funds, bank cards, financial cards of three. Provident Fund designated the 1st window, bank card number 2,3,4 specified window, specify the financial card business window No. 5,6. No. However, if the window are all busy and 5,6, and 2,3,4-number window free time, financial cards can also be one of idle processing window No. 2,3,4