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
32. 有關變頻器(inverte r)之弦式脈波寬度調變(s inusoida l pulse -wid th modula tion)，下列敘述何者正確？(A)增加輸出電壓之低次諧波含量(B)調變
問題詳情
32. 有關變頻器(inverte r)之弦式脈波寬度調變(s inusoida l pulse -wid th modula tion)，下列敘述何者正確？
(A)增加輸出電壓之低次諧波含量
(B)調變波為弦波命令與載波之方波作比較
(C)調變波為方波命令與載波之三角波作比較
(D)減少輸出電壓之低次諧波含量。
參考答案
上一篇 :
31. 上下班的交通方式有很多種，其中包括：A.騎腳踏車；B.搭乘大眾交通工具；C 自行開車，請將前述幾種交通方式之單位排碳量由少至多之排列方式為何？(A)ABC(B)A CB(C)BAC(D)CBA
下一篇 :
20. 如右圖所示，某抛射體從100 m高的懸崖頂以斜角30°發射，其初速度為80 m/s，試問抛射體所能到達距地面之最大高度為何？(假設重力加速度g=9.81 )(A) 121.33 m(B) 14
資訊推薦
▲閱讀下文，回答第 31-35 題Each culture has its own customs. Some of them are ( 31 ) our own while others may
▲閱讀下文，回答第 36-40 題With more than one billion Christians living in nearly every country around the wor
▲閱讀下文，回答第 41-45 題Everglades National Park, which was established in 1947, is the biggest wetland in
【題組】33. (A) pretended (B) introduced (C) merged (D) allowed
【題組】32. (A) at (B) for (C) with (D) to
【題組】34. (A) As a result (B) At most (C) At stake (D) On the contrary
74. 有一不規則計數器，共有 4 個不同的狀態(如下圖)，由變數 x 控制不同的計數順序，則下列哪些敘述正確？(A)當 x =0 時，計數順序為 00→01→10→11→00..(B)當 x=1 時
【題組】42. What is the second paragraph mainly about?(A) To tell the legend of Everglades National Park
【題組】37. (A) Besides (B) Although (C) If (D) Despite
【題組】38. (A) decorated (B) promoted (C) obtained (D) contacted
【題組】43. According to the passage, which of the following do NOT support the conservation ofEverglade
【題組】44. Which of the following is closest in meaning to navigated in the second paragraph?(A) cruise
【題組】39. (A) dialed (B) topped (C) skipped (D) added
【題組】45. According to this passage, which of the following is possibly the passage adopted from?(A) A
【題組】40. (A) perhaps (B) never (C) indeed (D) uncertainly
▲閱讀下文，回答第 46-50 題Some people scream when they see a five-centimeter-long cockroach. Imagine seeing a
30. Jason: How do you like the salad?Kelly: _______________Jason: Really?Kelly: Yes, but the soup ta
【題組】35. (A) buys (B) brings (C) sells (D) comes
【題組】47. According to the passage, what difference is described between dragonflies and damselflies?(
【題組】48. The word “they” in the last 3rd line of the second paragraph refers to ________.(A) cockroac
【題組】49. Why might dragonflies be considered a friend to humans?(A) They make good pets. (B) They are
【題組】50. According to the passage, which of the following statements about dragonflies is TRUE?(A) Mo
64. 下列何者 屬於 MCS-51(8051)組合語言的假指令？(A)EQU(B)N OP(C)DB(D)ORG。
66. C 語言程式中的 for，while 及 do…wh il e 三種迴圈，下列敘述何者正確？(A)do…while 迴圈是在測試判斷條件不成立時執行迴圈主體(B)do…while 迴圈至少執行
65. 對一個 8-inputXOR 閘，哪些輸入情況可使輸出為 1？(A)10111011(B)00110111(C)11101110(D)01011110。