9. 以放射性 123T-Nal 進行甲狀腺功能檢查，已知 123I 的半衰期為 13.2 小時，則投藥後多久，放射強度會降至原來的 12.5%？ (A) 46.2 小時 (B) 39.6 小時 (C) 26.4 小時 (D) 19.8 小時

11. 下列敘述何者正確？ (A) The 2s orbital is the same size as the 3s orbital. (B) The process of adding more solvent to a solution is called concentration. (C) Mixtures can be separated into pure substances by various means including distillation and filtration. (D) The electrolysis of water produces H2 gas at the anode and O2 gas at the cathode.