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18 關於執行機關請求其他機關於行政執行時提供協助之敘述,下列何者錯誤?(A)在執行機關管轄區域外執行或無適當之執行人員而有必要時,得請求協助 (B)被請求機關得拒絕提供協助,但以有正當理由為限 (C)執行機關如認為被請求機關之拒絕欠缺正當理由,應由執行機關之上級機關決定之 (D)執行機關應負擔被請求機關因協助執行所支出之費用

1. 菸酒零售是屬於哪一級產業? (A) 第一級產業 (B) 第二級產業 (C) 第三級產業 (D) 第四級產業

76.接受 12 mCi99m TcO4 -1造影的哺乳媽媽,根據 10CFR35.2075 規定,建議至少停止哺乳多少小時?(A)6 (B)12 (C)24 (D)48

77.關於正子影像系統中隨機事件的敘述,下列何者最不適當?(A)隨機事件中的光子對來自於不同的互毀事件 (B)在三維模式時,隨機事件計數率會比二維模式少 (C)如果不校正隨機事件,會造成影像低對比的現象 (D)當活性增加時,隨機事件計數率也會增加

16. Which of the following statements best describes a competitive inhibitor? (A) It binds to the enzyme-substrate complex and increases Km without affecting Vmax. (B) It binds to the enzyme-substrate complex and decreases both Km and Vmax. (C) It binds to the active site and increases Km without affecting Vmax. (D) It binds to the active site and decreases both Km and Vmax. (E) It reacts with an active site residue and binds irreversibly to the enzyme.

18. An enzyme shows sigmoidal kinetics, meaning that the plot of initial velocity (Vo) versus substrate concentration ([S])displays an S-shaped curve. What does this suggest about the enzyme?(A) It binds a single substrate molecule and follows first-order kinetics.(B) It undergoes irreversible inactivation during catalysis.(C) It exhibits cooperative binding, often due to allosteric interactions between subunits.(D) It becomes saturated with substrate only at very high temperatures.(E) It is competitively inhibited at high substrate concentrations.