The disadvantage of optical fiber communication is high transmission loss. ()
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The first is broadly the way Britain is at the moment: a mosaic of communities--Bangladeshi, Afro- Caribbean, Chinese or Jewish holding fast to a strong social identity, but lumbered also with a whole raft of benefits and disadvantages, most of them defined in economic terms l6. It's possible that will still be the pattern in 50 years time, but not very likely.
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