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Infants start using gestures,such as showing and pointing,at about _________ months of age.They may wave bye-bye or nod to mean "yes."
Q15: During the _ years,most children gradually become
Q17: Which of the following pubertal changes in
Q48: Executive functioning has been linked to development
Q54: During which stage of development is preoccupation
Q57: In terms of contraceptive use,which of the
Q84: What do the subtest and composite scores
Q87: Three-week-old Katherine has been breast-fed,but is now
Q100: _ is a hormone associated in boys
Q103: _ memory refers to the conscious memory
Q124: David Elkind believes that adolescent egocentrism can