資訊推薦

• 25 一個 3 MeV 的正電子和一靜止的電子產生互毀作用，則所輻射的總能量為多少 MeV？(A) 4.02(B) 3 (C) 1.98(D) 1.02
• 26 鉛的總衰減係數在那個能量附近有一最低值？(A) 30 keV(B) 300 keV(C) 3 MeV(D) 30 MeV
• 27 測量半值層時，為何要使用窄射束？(A) 減少光子通量(B) 增加作用機率(C) 減少能量損失(D) 減少散射輻射
• 28 直線加速器那一種光子射束照野的電子污染會最大？(A) 40×40 cm2(B) 30×30 cm2(C) 20×20 cm2(D) 10×10 cm2
• 29 活性的 SI 單位是？(A) 居里(B) 侖琴(C) 貝克(D) 雷得
• 30 醫用高能直線加速器的光子射束，最主要源自於？(A) 特性輻射(B) 制動輻射(C) K 輻射(D) δ輻射
• 31 利用原子爐製造的同位素，大部分進行那一種衰變？(A) β- (B) β+ (C) α(D) 電子捕獲
• 32 下述那個不是基本的物理量？(A) 功率(B) 質量(C) 時間(D) 電流
• 33 下述那個是吸收劑量的單位？(A)C/kg(B) J/kg(C) rem(D) Sv
• 5. 科學家可利用生物科技複製動物如桃莉羊，在不考慮突變的情況下，桃莉羊與親代之間的基因相似程度與下列何者不同？(A)番薯及其以塊根繁殖產生的子代(B)青蛙及其以體外受精產生的子代(C)變形蟲及其以分
• 6. 「民眾舉報黃老闆工廠中有一批盜採的岩塊，稽查人員到達黃老闆宣稱採集岩塊的地點進行了解，發現此地的岩塊外形比較圓滑，體積較小，而工廠中的岩塊有稜有角，體積也較大，且該地點幾乎不見與工廠中外形、大小
• 7. 圖(一)為某地的地質剖面示意圖，其中岩層甲、乙均為沉積岩，丙為一岩漿冷卻後的岩脈。若此地地層均未經過倒轉，關於甲、乙、丙形成的先後順序關係，下列推論何者最合理？ (A)甲在最上層，故甲最早形成(
• 34 下列敘述何者正確？(A) 進行 EC 衰變放出γ射線(B) 放出γ射線時不放出β射線(C) 鄂惹電子的能量分布是連續性的(D) β+衰變放出的正子之能量的分布是連續性的
• 2. The ______ snow last weekend stopped us from going out, so we just watched TV at home.(A) common
• 3. When Cindy  ______  cleaning her room, she looked around and felt proud of herself.(A) finished (
• 4. Every time my family goes out, my brother is always the last one to  ______ . We often haveto wai
• 5. Lisa is happy that she got a good  ______ on her history test. She prepared for it for days.(A) g
• 6. The famous writer likes to write at this coffee shop. He comes in the early morning andstays here
• 7. The little boy often asks his father  ______  candies and cookies for him.(A) buy (B) buys (C) bu
• 8. Kyle’s so  ______  that he always thinks he’s right. That’s why he never says sorry even whenhe d
• 9. The cellphones that in that  ______  country are good but expensive.(A) make (B) are making (C) h
• 10. ______   the map that Ryan had drawn for us, we were able to find this beautiful old church.(A)
• 11. During the race yesterday, Julie  ______ got to the finish line first. However, she fell at thel
• 12. After the fire, everyone in the apartment was ______   when they cooked. They did not wantany pe
• 13. Tom: I need an eraser. Can I use yours? Judy: Sure. I’m not using ______   now.(A) another (B) e