单项选择题
A.UPDATE SET BIRTH WITH 2021-BIRTHB.REPLACE BIRTH WITH 2021-BIRTHC.UPDATE CUST_INFO SET BIRTH=2021-BIRTHD.UPDATE CUST_INFO BIRTH WITH 2021-BIRTH
A.导电电路B.数字集成电路C.模拟电路D.智能电路
A.导电B.存储C.改变D.反馈