جزییات کتاب
Education is often seen as a fundamental means to improve economic prospects for individuals from low income settings. However, even with increased emphasis on basic education for all, many individuals fail to achieve basic skills to succeed in life. The book presents evidence that one core reason is that by the time a child is old enough to attend school, there is already a wide disparity in cognitive skills and in emotional and behavioral development among children from households of different socioeconomic backgrounds. Low levels of cognitive development in early childhood strongly correlat. Read more...
درباره نویسنده
آلدرین با الدی ۵۰ ۶۷ (L.D.۵۰= ۶۷ mgkg-۱) جزء سموم کلره است و به نام جسم ۱۱۸ نیز نامیده میشود. خاصیت سمی آلدرین برای حشرات بسیار زیاد است ولی در عوض خاصیت پایداری آن کوتاه است.