Yes the batter can switch as often as he would like. It just has to be after the strike.
Only in one situation and that is if he can convince the umpires that he suffered an injury between the time he was called in and the time the batter enters the batter's box (like during his warmup pitches). Otherwise, he must pitch to at least one batter.
Inhalation.
If a relief pitcher enters the game with a 2 ball 0 strikes on the batter and the batter receives a base on balls it is charged to the preceding pitcher. Any other action such as a base hit, fielder's choice, reaching base on an error, etc., is charged to the relief pitcher. (Rule 10.18 (g)).
There is no such thing. Besides, a boy is long past being a baby when he enters puberty at about age 10 or 11.
sublimation
frequency
Air, oxygen
The gas that enters the atmosphere during the light reaction is oxygen (O2). Oxygen is produced as a byproduct when water is split during photosynthesis.
oxygen gas
co2
oxygen
The defendant enters a plea