題庫堂
檢索
題庫堂
首頁
數學
英文學習
政治學
統計學
經濟學
藥理學
中醫藥物學
財政學
法學知識
公共行政
警察學
BI規劃師
財務管理
公共衛生學
工程經濟學
電力電子學
當前位置:
首頁
78.某一冷凍機之冷凝溫度為 30℃、蒸發溫度為-20℃,則此冷凍機之 COP 最高為多少?(A) 4.06 (B) 5.06 (C) 6.06 (D) 7.06
問題詳情
78.某一冷凍機之冷凝溫度為 30℃、蒸發溫度為-20℃,則此冷凍機之 COP 最高為多少?
(A) 4.06
(B) 5.06
(C) 6.06
(D) 7.06
參考答案
答案:B
難度:
計算中
-1
書單:
沒有書單,新增
上一篇 :
77.若冰水流量為 10L/s,且冰水維持在 7℃進、12℃出,則冷凍負荷約為多少?(A) 209W (B) 2.09kW (C) 20.9kW (D) 209kW
下一篇 :
79.一冷卻機之壓縮機作功 2HP、產生 8 kW 之冷凍能力,則其 COP 約為多少?(A) 4 (B) 5 (C) 5.36 (D) 10.72
資訊推薦
80.若一空調系統,原始設計流量為 100L/s、正常轉速為 2000rpm,加壓至 200kPa,泵軸功率為 80kW;當空調系統下降至 50L/s 時,泵之轉速、揚程與軸功率分別應降為多少?(A)
1.請選出選項中「」裡的成語運用正確者:(A)初到城市生活,有如「吳牛喘月」般鬧了許多笑話(B)我的這點淺見只是「野人獻曝」,僅供大家參考(C)規劃事務必須全面,要秉持「首鼠兩端」的精神以免疏漏(D)
【題組】36.阿明和阿華正在聊關於災防吿警細胞廣播服務的傳遞。下列關於他們兩人對話的評述,何者最合適? (A)阿明由成效陳述傳遞流程,是「不易之論」(B)阿華所述屬「不刊之說」,描述三者間關係(C)阿
5. 下圖是食神餐廳的價目表,開幕日全面八折,當天香吉士點了黯然銷魂飯後,還想再點一份x元的餐點,且結帳時兩份餐點的總花費不超過200元,則第二份餐點可以有幾種選擇? (A)8 (B)7 (C)6 (
2. It’s best to ____ your own tea than to buy bottled teas, which are full of sugar.(A) brew (B) lea
3. Going vegan may not be as hard as you first thought as many of your favorite snackscould already
4. In this activity, a team member tries to communicate to the others a particular word orphrase by
5.Today L2 teachers use pictures and props to help students understand. This wasoriginally from ____
6. What is this method? Memorized dialogues and pattern drills help reinforce structuralpatterns. Th
7. _____ are words that sound the same when spoken, but have different meanings and arespelled diffe
8. In Content and Language Integrated Learning, the 4Cs principles are proposed to guideteachers to
9. Phonological awareness is:(A) a person’s ability to manipulate sound structures of speech(B) a pe
10. Which is NOT part of the writing process?(A) brainstorming (B) re-reading (C) revising (D) makin
11. Cooperative learning involves students working together:(A) as partners(B) in small groups(C) on
12. When students “understand that people around the world are different and shaped bydifferent circ
13. The teacher introduces new vocabulary and a grammar structure. Students completeexercises in the
14. A teacher writes an instructional objective as: By the end of this lesson, the studentswill be a
15. There are lots of ways we can look after our planet. Three great ways are 'the three Rs
16. The process of going from one language to the other in mid-speech when bothspeakers know the sam
17. We really enjoyed the new movie, especially the performances. The lead actor’s__________ of a fa
18. Which of the following may NOT be a strategy for enhancing and maintainingstudents’ motivation?(
19. In the following linguistic explanations which is NOT true?(A) The prefixes un- and dis- can for
20.Which of the following statements concerning CLIL (Content and Language IntegratedLearning) is NO
第五題:在關聯式資料庫應用中,會利用程式語言撰寫有關處理資料的運作功能,請回答下列問題:【題組】(一)預存程序(Stored Procedures)的定義和效益為何?【7 分】
【題組】(二)觸發器(Triggers)的定義為何?【3 分】