資訊推薦

• 54.有關電晶體的結構與特性，下列敘述何者錯誤？(A)集極面積大於射極面積(B)摻雜比例是射極多於基極(C)降低集極摻雜濃度，可提高其逆向崩潰電壓(D)電晶體的電流是由多數載子所形成
• 55.有關石英晶體振盪器之敘述，下列何者錯誤？(A)石英晶體組成的振盪器頻率最為穩定(B)石英晶體是一種壓電效應之材料(C)石英晶片愈薄振動頻率愈低(D)低頻振盪器一般採用 RC 電路為主
• 4.（ ）我們可用下列哪一個條件來判斷附圖電阻的電阻值？ (A)電阻的長度　(B)電阻的廠牌　(C)電阻的色環　(D)電阻的重量
• 61.如 (圖61) 電路中，當開關S閉合瞬間，電流I之值為多少安? (A)2A(B)3A(C)4A(D)5A
• 5.（ ）下列關於附圖電阻器的敘述，何者正確？

(A)接腳有極性之分，安裝時應注意正負極性　(B)只允許電流單向流動，逆向時形成斷路　(C)可用於調節電路中流過的電流　(D)通電時，具有儲存電荷的功
• 62.有一台8極的交流發電機，若產生的電源頻率為25 赫茲(Hz)，則該機每分鐘轉速為多少轉?(A)375 (B) 600 (C)750 (D) 1200
• 63.交流壓及電流之方程式如下:v(t)=100cos(314t-30°)V，i(t)=-5sin(314t+60°)A，則兩者的相位關係為:(A)電壓領先電流 30(B)電壓領先電流90度(C)電壓
• 47.如【圖 47】所示，其戴維寧等效電路阻抗 為何？ (A) 6-j8 Ω(B) 6+j8 Ω(C) 8+j6 Ω(D) 8-j6 Ω
• 36.一負載接上 DC 110 V 電壓量測電流為 13.75 A，若接上 AC 110 V 則電流為 11 A，此負載為何？(A) R=8 Ω， =10 Ω (B) R=10 Ω， =8 Ω(C)
• 6.（ ）若附圖電路中有一LED會持續發亮，只有在按下關開時才會熄滅，放開開關後又會亮起。則電路的「？」處應該安裝何種開關？ (A)常開按壓開關　(B)常閉按壓開關　(C)2段2腳滑動開關　(D)3段
• 102.The cafe on the first floor _____ a variety of sandwiches for busy professionals to graband go.(
• 103.Applicants must pass a rigorous examination in order to _____ for the banking position.(A)qualit
• 104.The use of temp workers _____ more common due to the flexibility and cost savings.(A)has become(
• 105.The marketing team has been in a dilemma _____ since the new regulations came intoeffect, trying
• 106.Effective cash flow management is crucial for any business to survive and grow, _____it helps to
• 107.A _____ workforce is essential for maintaining high levels of productivity and quality inthe man
• 108.Inadequate staffing and heavy workloads can contribute to work-related stress amongwarehouse wor
• 109.Allowing unused food to spoil in empty kitchens is _____ resources and contributes toenvironment
• 110.The company's employee dining program _____ staff to eat together and socializeduring lunch
• 111.We are exploring measures to accelerate our fundraising efforts for the charity,including partne
• 112.With the current job market _____ so competitive, it's important for universitygraduates to
• 113.Retirement is _____ to relax and enjoy life.(A)period(B)a time(C)devotion(D) crucial
• 114.Owing to her micromanagement, many find Frankie a difficult boss _____ .(A)who please(B)whose pl
• 115.Worries about job security _____ many people to pursue civil service exams(A)drives(B)which driv
• 116._____ the tragedy of being laid off, many employees struggle to cope with theiruncertain future.