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The Lasers Used Today for PSL in CR Units Are

question 26

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The lasers used today for PSL in CR units are ____________________ lasers that produce light with a 680 nm wavelength compared to He Ne lasers that produce light with a 633 nm wavelength used in earlier CR units.

Explain the phenomenon of overextension and underextension in language development.
Grasp the concept of prelinguistic communication and its importance.
Recognize the role of grammar, syntax, and semantics in linguistic development.
Appreciate the universality of language development stages and their innate aspects.

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