共 53 条
[1]
[Anonymous], 2009, CHILD TRENDS
[2]
[Anonymous], 2012, 201237A OPRE US DEP
[3]
[Anonymous], 201321A OPRE US DEP
[4]
[Anonymous], 1995, Meaningful differences in the everyday experience of young American children
[5]
[Anonymous], 2010005 NCES US DEP
[8]
Biemiller A., 2001, AM EDUC, V25, P24
[9]
Bingham G.E., 2007, Early Education and Development, V18, P23, DOI [10.1080/10409280701274428, DOI 10.1080/10409280701274428]