True allergies to cow's milk are relatively uncommon. Only 2 to 3 percent of children are allergic to milk, according to the AAP, and almost all of them outgrow it by age 3. (Learn the difference between a milk allergy and lactose intolerance .).
The underscore [ _ ] (also called underline, underbar, low line, or low dash) is a character that originally appeared on the typewriter and was primarily used to underline words.
On a standard keyboard, the hyphen is found to the immediate right of the 0 key. The underscore symbol is located on the same key as the hyphen, and is typed by pressing the shift key and the hyphen key simultaneously. Keep Learning.