A highlight display flag is assigned to a link datum having undergone addition or modification when road map data are updated. The volume available to the test fluid inside the reaction space after insertion of the degradation test specimen is less than or equal to 10 ml. In such a case, the image-taking apparatus selects the second light-emitting section to emit auxiliary light from the LED. Therefore, there is a uniform spacing between the lines and the cell free layer. When the data transmission network node is re-selected, a data transmission network node that is relatively geographically near to the mobile terminal is selected. The method also includes controlling the parafoil’s flight path consistently with the determined locations.