If a tv reporter says "its 3rd and a 2" what does it mean ? (football)

Nina has the flu and a high fever. her immune system is exhibiting the line of defense. this defense is part of immunity.

To avoid food poisoning, perishable items should not be stored in the refrigerator for more than days.

Practice or pre-exercise theories of play pose the idea that a. play provides children with an opportunity to practice adult activities. b. play is necessary to reenergize human cognition. c. children have too much energy and play will rid them of that energy. d. children are the link between animals and human beings.