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Jhaveri,a researcher at the Queensland Brain Institute at The University of Queensland."In the hippocampus,newneurons are constantly being created.In adulthood,new cells are still being produced,but the rate of production inthe hippocampus slows down,"says Dr Jhaveri.Neuroscientists believe that the rapid rate at which brain cells are being produced in childhood could be thecause of infantile amnesia.Because so many new neurons are being produced and form connections with eachother in memory circuits(记t忆电路)，they might disturb existing networks of memories that have already formed.But it turns out that a child's ability to remember things for long periods of time improves graduallythroughout childhood.For example,in studies in which young kids were taught to imitate an action,six-month-olds could remember what to do for 24 (but not 48)hours,while nine-month-olds could remember whatto do one month (but not three months)later.Despite this memory loss,childhood experiences have been found to influence adult behaviour years later,which suggests that traces of these memories could be stored somewhere in the brain that isn't easy to access.So while your kids might not recall their major milestones or be too young to remember a trip to Disneyland,positive experiences as toddlers or in infancy may continue to affect their behaviour long after they've forgottenthem.8.What can be inferred from paragraph 3?A.Our brain's ability to store memories remains unchanged as we grow.B.The size of the child's brain by age two is twice the size at birth.C.The growth in the number of neurons will influence the size of the child's brain.D.Neurons have nothing to do with a person's memory9.What is the cause of infantile amnesia according to the neuroscientists?A.The rapid rate of brain cells being produced.B.The existing networks of memoriesC.The way of our brain storing memories.D.The memory circuits of our brain.10.What is paragraph 6 mainly about?A.Childhood experiences will influence adult behaviour years later.B.Traces of these memories could be stored somewhere in the brain.C.A child's ability to remember things improves gradually over time.