A/LSinhala
2025 A/L Bio Systems Technology Paper
Bio Systems Technology · 2025 · Marking scheme
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2021 උසස් පෙළ ජෛවපද්ධති තාක්ෂණවේදය ප්රශ්න පත්රය·2021 உயர்தர உயிர் முறைமைகள் தொழினுட்பவியல் வினாத்தாள்
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