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

 
Đề thi Olympic Quốc Tế Lần 14 - Năm 1972

Thể loại: Toán
Language: English
Đề Thi
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