資訊推薦

• 129. 有一負載已知其功率因數為 0.5，消耗功率為 100kW 擬利用電容器將功率因數提高至 0.8 時，則所需電容器容量約為 (A)40kVAr (B)60kVAr (C)80kVAr (D)1
• 130. 某三相線路，其線電壓為 11.4kV，負載為 568kW，而功率因數為 0.8，則其線電流約為 (A)20 安培 (B)24 安培 (C)30 安培 (D)36 安培 。
• 131. 有一具 100 伏、200 瓦之單相感應電動機，若在滿載時之效率為 55％，而功率因數為 60％，則該機之滿載電流約為 (A)2 安培 (B)3 安培 (C)4 安培(D)6 安培 。
• 132. 有一線圈，已知其電阻為 12 歐姆，而阻抗為 17 歐姆，則其電抗為 (A)5歐姆 (B)9 歐姆 (C)12 歐姆 (D)15 歐姆 。
• 【題組】50. Sam wants to go to the ice cream shop, and he is asking someone for help. Who can help him g
• 【題組】28. 學生使用保麗龍杯卡計進行 Ag+(aq) + Cl-(aq) → AgCl(s)沉澱反應熱之測定。取初始溫度均為 23.40 oC、體積為 100.0 mL 之 0.100 M AgN
• 133. 三條 220V 用之電熱線結成△，並由三相電源供電時，其消耗功率為 3kW，如將此電熱線結成 Y，並接於相同電源時，其消耗功率變為 (A)1kW(B)1.5kW (C) kW (D)2kW
• 【題組】29. 若利用下列二個半反應 Ag/Ag+ 和 Mg/ +組裝一個伏打電池 (voltaic cell)，則此電池於25 oC 下之標準電位為何? (A) 0 V (B) 0.77 V (C
• 2. 下列各式的因式分解何者正確？(A) x2+4x+9=(x+3)(x+3) (B) 5x2-9x-2=(5x+1)(x-2) (C) 2x2-x-3=(x-1)(2x-3) (D)6x2-5x-6
• 3. 下列哪一個選項中的方程式和 x2 = 9 沒有相同的解？(A)4x2 = 36 (B)(x+3)(x-3)=0 (C)x2+x = x+9 (D)x2+2x-9=0
• 1. The mayor declared a citywide _____ ahead of a storm that is expected to bring record rainfall th
• 4. 已知一長方形的面積為 6x2+23x+21，則下列何者為此長方形的邊長？ (A)6x+7(B)x+3 (C)3x+7 (D)2x+1
• (33-34) construction worker 建築工人 be supposed to 應該【題組】33. From the dialogue above, who has gender st
• 12. I was taking a bath when someone _________ off the light. (A) was turning (B) turn (C) turns (D)
• 13. A: Is it one forty-five?B: Yes, it’s ________. (A) a quarter to two (B) a quarter after one (C)
• 14. Jerry __________ the bathroom when his brother ______ him. (A) is using； called (B) used； was ca
• 15. _______ Joe and Mike talking on the phone at 8:40 last night? (A) Did (B) Was (C) Were (D) Do
• 16. David is thinking __________ jobs. (A) for change (B) about changing (C) about change (D) for ch
• 17. I plan ______ my bedroom this weekend. (A) cleaning (B) clean (C) cleaned (D) to clean
• 18. _______ in the sea on a sunny day is nice. (A) Swim (B) To swimming (C) Swam (D) Swimming
• 19. Mom always tells me not _______ only for tests. (A) to study (B) studied (C) studying (D) study
• 20. Playing sports at least three times a week ________ good for your health. (A) are (B) has (C) ha
• 21. Grace forgot ________ her homework, so her teacher was very angry. (A) did (B) to do (C) doing (
• 三、克漏字選擇 8% Billy was terrible at sports. He tried boxing before, but he did not enjoy it. Billy didn
• 【題組】23. (A) to watch (B) watching (C) watched (D) to watching