資訊推薦

• 25. 若實數 x, y 滿足3x-2y=20，則x2+4y2的最小值為？(A) 20 (B) 30 (C) 40 (D) 50
• 26. 下列哪個選項的 a 值讓 x+ay= 3和ax+9y=9的圖形沒有共同點？(A) 6 (B) 3 (C) −3 (D) −6
• 12. Which of the following ions are aromatic species? (A) I and III (B) II and IIl(C) II and IV (D)
• 13. Rank the following compounds in order of decreasing reactivity to aromatic electrophilic bromina
• 27. 坐標空間中有兩平面x+2y+2z=3以及6x+3y-2z=7，若這兩平面的銳夾角為θ ，則cosθ的值為？(A) (B) (C) (D)
• 38. 有關二氧化鈦奈米光觸媒的敘述，下列哪些正確? (A)二氧化鈦奈米光觸媒被紅外光照射後，可引發一連串的氧化還原反應 (B)二氧化鈦光觸媒若發揮功效，可使週遭的水分子產生氫氧自由基 (C)二氧化鈦
• 7. 請比較 三物質的鍵長與鍵能，以下所述何者正確？(A) 鍵長最長 (B) 鍵長最長(C) 鍵長最長 (D) 鍵能最大
• 7. The function f satisfies the equation Evaluate f(π/3). (A) 6.196 (B) 2 (C) 3.098 (D) 4 (E) 3.055*
• 14. Where would the compound shown below undergo bromination with Br2/FeBr3? (A) ortho/para position
• 39. 當 反應達平衡時，做下列選項中的改變，則對系統所造成影響的敘述，哪些正確?(A)加入水，則平衡向左移動(B)加入與原溶液等體積的水，則 增加(C)加入 FeCl3(s)使其溶解，則[SCN－]
• 8. The function g(x) is the derivative of . What is the derivative of theinverse of g(x) at x = 3?(A
• 15. In the Friedel-Crafts alkylation of benzene, dialkylation is often a significant by-product.In t
• 16. What is the IUPAC name of the following compound? (A) 3-bromo-2-methylcyclohexene(B) 1-bromo-2-
• 9.當 存在其值為一3。請問下列哪個選項是正確的?(A)a=0(B)a?=9(C)a=-3(D)a=3(E)以上皆非。
• 17. In the SN2 reaction, the "2" stands for (A) two reactants in the reaction. (B) two ste
• 18. Which of the following reacts the fastest by theSN2 mechanism?(A) CH3Br (B) CH3；CH2Br (C) (CH3)2
• 19. Identify the mechanistic pathways, respectively, for the products in the following reaction.(A)
• 40. 當定溫下某一已經平衡的反應系統中，加入催化劑，會改變下面哪幾項? (A)平衡常數 (B)正反應速率(C)逆反應速率 (D)產率(E)反應所需的低限能 。
• 20. Which one of the following compounds cannot undergo an E2 reaction?(A) 1-bromo-2,3-dimethylbutan
• 21. Which of the following sets of conditions most favors the E1 mechanism?(A) when the alkyI halide
• 22. Which of the following cannot be made by the reduction of a ketone or aldehyde withNaBH, in meth
• 23. As a reducing agent, NaBH4 donates a________to a ketone or aldehyde.(A) proton (B) hydrogen atom
• 10.當 。請問下列哪個選項是正確的?(A)k=3(B)k= 1(C)a=1/6(D)a＜b(E) c=3
• 2.管道縱斷面高程測量是測量路線中心線上里程樁和曲線控制樁的地面高程，應用小木樁標定里程，下列敘述何者不正確？(A) 木樁的間距一般為 200 m ~ 500 m。(B) 在實際工作，遇到特殊情況應設
• 3 鋼結構體放樣事項不包括下列何者？(A) 柱基面鐵片的高度。(B) 柱礅頂上固定螺栓的模片位置。(C) 建築物外牆的垂直性。(D) 構件的水平及垂直方向。