To provide an exposure method and an exposure apparatus, using a complementary divided mask, designed to enable alignment of a complementary divided mask at a high precision over the entire region of a semiconductor wafer. The molten metal is cooled to a eutectic temperature to simultaneously form purified metal crystals and crystals containing at least one foreign element, and at least some of the crystals containing at least one foreign element are separated from the purified metal crystals by using a solid-solid separation technique. During the standard round each time a question is asked the contestant will this designated amount time to respond. Information located in the remote storage may be saved in the local storage until it reaches a certain age, until it fails to be accessed for a threshold period of time, or until the location moves outside a threshold radius associated with a location of the information located in the remote storage.