[Công nghiệp hóa] [Những Bà i Là m Văn 12] [à nh sáng phương bắc] [nam h�c] [At the end of a factory assembly line, completed widgets are deposited into a box until it is filled. If after 10 minutes the box contains 25 widgets and it takes 2 hours total to fill up a box, how many widgets must each box hold] [LÃÂ m chá»§ cảm xÃÆ%E2%80] [diseño no experimental] [phép nghịch đảo] [trong vùng tam giác sắt] [NHá»®NG THÓI QUEN NGUYÊN TỬ]