There is a temperate zone in the mind, between luxurious indolence and exacting work; and it is to this region, just between laziness and labor, that summer reading belongs.
Henry Ward Beecher
Hóa Học Lớp 10
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Hóa Học Lớp 10
Nguyễn Xuân Trường
Hóa Học Lớp 10 - Nguyễn Xuân Trường
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