When Miguel stopped using a particular drug, he did not experience heroin-like withdrawal symptoms; but he did experience a jarring "crash" of his mood and energy, and, within a few days, a long period of fatigue, anxiety, paranoia, boredom, and anhedonia. Miguel most likely stopped using which drug?

The source of the lust for power that eventually leads to isolation and fear is the

a) productive orientation. b) receptive orientation. c) being mode. d) having mode.

Computer programs called _____ systems are designed to carry out specialized tasks in a limited domain, such as helping physicians diagnose blood diseases

a) expert b) knowledge c) helper d) artificial