22 đề tài xuất sắc về khoa học, kỹ thuật của học sinh phổ thông
(TNO) - Trong hai ngày 30 và 31.3, cuộc thi khoa học, kỹ thuật cấp quốc gia năm 2013 với sự tham gia của học sinh đến từ 23 tỉnh, thành phố phía bắc đã diễn ra tại Trường THPT Chu Văn An (Hà Nội).
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