1. 歴史   geography   history   calculus   chemistry   Hint Half-n-half Clue   2. 生物学   geography   biology   physics   philosophy   Half-n-half Clue   3. 代数学   philosophy   history   calculus   algebra   Half-n-half Clue   4. 天文学   psychology   physics   zoology   astronomy   Half-n-half Clue   5. 物理学   history   zoology   physics   calculus   Half-n-half Clue   6. 植物学   botany   biology   psychology   astronomy   Half-n-half Clue   7. 微積分学   trigonometry   philosophy   history   calculus   Half-n-half Clue