Normally, lactose is quickly broken down in the body if a person has the _ called lactase. Lactase breaks up lactose into the two monosaccharides that make up lactose. the monosaccharides are _ and _
[see chemical equation below ]

Are you asking about a street map usage  if so here is your answer  a street map for a very limited area could simply be a bit map or a .jpg image.  but a more general map would probably store the streets as vectors.  but you shouldn't assume that there is one way to do it

Idk little ngr try paying attention in school and you would know ngr