Mylittlecousinisgreatlyinterestedonscience.Andhedoessom...
问题详情：Mylittlecousinisgreatlyinterestedonscience.Andhedoessomedangerousexperimentssometime.Althoughhisparentswanttoencouragehimtobegreatscientist,attimestheyworryabouthissafety.Lastweek,whenmycousin...