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【单选题】
当单片机通过与液晶1602的RS、R/W相连的IO口把RS、R/W设置成0、0时（ ）A.
表示单片机可以向液晶 1602 发送指令
B.
表示单片机可以向液晶 1602 读取指令
C.
表示单片机可以向液晶 1602 发送显示的数据
D.
表示单片机可以向液晶 1602 读取数据信息
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