What is a difference between a work team and a cross$-$functional team?

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Members of a work team all work in a temporary group and then disband, whereas members of a cross$-$functional team work on different sites.

Members of a work team all have similar specialties, whereas members of a cross$-$functional team all have different specialties.

Members of a work team work on different sites, whereas members of a cross$-$functional team all work in the same building.

Members of a work team all have different specialties, whereas members of a cross$-$functional team all work to solve a specific problem.