2011年10月13日 · I believe that people say "kilometers squared" when reading off a formula or a value because this word order matches the order of the characters on the page, which means they don't need to "read ahead" to see the 2 before saying "kilometer" as they read the formula from left to right.

No. Yes. Maybe. It depends. It's always been my understanding with metric measures, that abbreviations for units larger than the base unit measure are capitalized, and units smaller than the base unit are lower case.