According to Piaget, young adolescents enter the stage of _____, in which thinking is based on an abstract system of logic

When a premature infant with low birthweight is placed in an incubator, oxygen is carefully monitored because too _____ of a concentration of oxygen _____

a) high; can damage the baby's retinas, leading to permanent blindness b) low; can damage the baby's retinas, leading to permanent blindness c) low; can prove to be fatal for the baby d) high; can prove to be fatal for the baby 1.2

Studies of the hearing children of deaf parents have found that:

a. these children acquire languages at about the same rate as other children b. these children acquire languages at a much slower rate than other children c. oral babbling persists longer than normal d. oral babbling extinguishes quickly