An event importance adjustment device which extracts events which reflect a course of video contents, and extracts scenes which reflect the course of the video contents. An internal timer of the microprocessor is activated by the control unit in response to the execution of a dedicated standby instruction of the microprocessor instruction set. 3 inclusive, and to which an oxidizing agent has been added. The nozzle-forming-surface visual-inspection unit allows the nozzle-forming surface to be visually inspected when the liquid receptacle is positioned at the non-receiving position. The functionality can form a suitability assessment for a candidate channel of arbitrary width, e.