問題詳情
44. 三角皮帶之斷面形狀為
(A)三角形
(B)正方形
(C)長方形
(D)梯形。
(A)三角形
(B)正方形
(C)長方形
(D)梯形。
參考答案
答案:D
難度:非常簡單1
統計:A(0),B(0),C(0),D(5),E(0)
內容推薦
- 公制三角螺紋的螺紋角是(A)65 度(B)60 度(C)55 度(D)45 度。
- 以雙線蝸桿帶動一個 60 齒且轉速為 40 rpm 之蝸輪,則蝸桿之轉速為(A)2400 rpm(B)1200 rpm(C)600 rpm(D)300 rpm。
- 下列那一種輪系,其傳動之速比最精確(A)皮帶輪(B)摩擦輪(C)齒輪(D)凸輪。
- 鋼管的直徑在 300 ㎜以下時,其公稱尺寸是依據何者決定?(A)外徑(B)內徑(C)管厚(D)管長。
- 最常用管螺紋的牙角角度為(A)30 度(B)45 度(C)55 度(D)65 度。
- 二平行軸之軸間距離較大時,為維持一定之轉速比,較佳的傳動機件為(A)V 形皮帶(B)鋼索(C)鏈條(D)繩索。
- 塔里木河流進塔克拉瑪干沙漠,堆積作用旺盛的主因為何?(A)流幅增寬 (B)坡度變緩(C)搬運物質增加 (D)流量減少。
- 有三個齒輪嚙合成為單式輪系,齒數依序為 20 齒、40 齒及 60 齒,當 20 齒之齒輪轉速為 120 rpm 時,60 齒之齒輪轉速為(A)40 rpm(B)60 rpm(C)80 rpm
- 管路之永久接頭的接合方式是(A)鉚接(B)熔接(C)嵌合凸緣連接(D)螺紋連接。
- 依我國國家標準(CNS),梯形螺紋的牙角是(A)29 度(B)5 度(C)30 度(D)31 度。
內容推薦
- 螺距 3 ㎜的雙線螺紋,每旋轉一圈沿軸向前進(A)5 ㎜(B)3 ㎜(C)6 ㎜(D)12 ㎜。
- 【題組】
- 在軸距和輪徑一定時,交叉皮帶長度與開口皮帶長度是(A)前者與後者等長(B)前者比後者稍長(C)前者比後者稍短(D)前者是後者的二倍。
- 傳動效率最高的螺紋為(A)三角螺紋(B)滾珠螺紋(C)鋸齒螺紋(D)梯形螺紋。
- 小光於野外坡地觀察到如圖的現象,他的說法為:(甲)這裡發生了潛移作用;(乙)電桿傾斜、樹幹彎曲是大雨造成的;(丙)土層正在往坡下移動;(丁)這個現象會造成立即生命危險;(戊)這是崩壞作用造成的景
- 32 下列有關 polycythemia vera 的敘述,何者錯誤?(A)紅血球、白血球與血小板的計數都會增加 (B)會分泌過量的 erythropoietin,導致紅血球增生(C) LAP sco
- 33 在 T 淋巴球的發展過程中,下列那一個細胞表面標記的出現最晚?(A) CD2 (B) CD3 (C) CD5 (D) CD7
- Food and drinkable water were _______ to the earthquake victims, and each of them received an equ
- 34 Sudan black B 主要是與細胞中的何種物質反應?(A) iron (B) carbohydrate (C) phospholipid (D) alkaline phosphatase
- 38 Dichlorofluorescein(DCFH)diacetate probe 搭配 flow cytometer,可用來測量細胞中的何種物質?(A) hydrogen peroxide (B
- To avoid explosions, everyone is _______ to use the cell phone at the gas station. Any violation
- Marshall’s rude comments _______ his clients. They were mad that he didn’t apologize first for hi
- 【題組】Many precious animals, once they are gone, won’t be found anywhere in the wild, _______ be r
- 39 運用 flow cytometry 分析白血球時,下列那一種血球有最小的 side scatter?(A) segmented neutrophils (B) eosinophils(C) my
- 37 成熟的顆粒性白血球在執行吞噬細菌功能時,會產生 superoxide 以殺死細菌。此步驟是藉助於下列何種物質?(A) selectin (B) non-specific esterase (C)
- Improper superstition should be _______, otherwise it will prevent people without enough educatio
- 【題組】The U.S.A, which _______ 50 states, is a democratic as well as powerful country in the world
- 【題組】Choose the CORRECT sentence.(A) You should learn the lesson and avoid to make the same mista
- 40 t(8;14)(q24;q32)的染色體轉位,使兩個基因 c-myc 及 IgH(immunoglobulin heavy chain)融合一起,此變化最有可能見於下列何種疾病?(A) foll
- 成語【題組】The audience _______ laughter right after the humorous comedian finished telling the hilar
- Annie gave up her _______ career in bioengineering and volunteered to teach those children in nee
- 【題組】_______ about her grandpa’s health, Tracy visits him every day after work. She is indeed a f
- V. 閱讀測驗(第 26 題至第 30 題,共 10 分)Superstar vloggers have got traditional media in a bit of a panic. And
- 【題組】No magician so far could have performed the same trick ______ there is a complete mystery.(A
- 【題組】Many problems in this city have _______ poverty. The government is now making effort to impr