1. wei ji [fen;fen]   geometry   calculus   geology   biology   Hint Half-n-half Clue   2. xin li xue   geometry   algebra   zoology   psychology   Half-n-half Clue   3. [de;di] zhi   algebra   history   geometry   geology   Half-n-half Clue   4. tian wen   astronomy   calculus   algebra   chemistry   Half-n-half Clue   5. dai [shu;shu;shuo]   physics   philosophy   trigonometry   algebra   Half-n-half Clue   6. zhi wu xue   biology   geology   botany   algebra   Half-n-half Clue   7. [hua;hua] xue   geology   calculus   chemistry   history   Half-n-half Clue