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Galina-37 [17]
3 years ago
10

PLZ HELP and best will get brainliest

Biology
1 answer:
vodomira [7]3 years ago
8 0

Explanation:

do number one like that and do number two different

that is systems with essentially only two energy levels are

important kind of systems, as at low enough temperatures, only the two

lowest energy levels will be involved.

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