There is provided an optical-connector-equipped optical fiber cable introducing method, according to which an introducing operation through an existing electrical wiring conduit or the like can be implemented, without damaging an optical fiber cable to be introduced, and with a small towing force. The third control signal is enabled when at least one of the banks performs the self-refresh operation or auto-refresh operation even though it is in the active state. The closure includes a filter configured to capture hydrocarbons positioned in the passageway so that fuel vapor flowing from the fuel tank is scrubbed of hydrocarbons before being discharged to the atmosphere. A package for the supplement can comprise a secondary container housing a primary container, which houses a supplement.