年級

問題的種類

數學 國中

請問20、21、25跟非選2詳解 謝謝你們

文: 請閱讀下列敘述後,回答24~25題: 在經濟學上,常用恩格爾係數(Engel Coefficient)來討論某地區的人口物質生活水 平,恩格爾係數是指家庭支出中,飲食費用所占的百分比。依十九世紀德國經濟學家 恩格爾的理論,所得愈多,其用於飲食費用的支出比值愈小;反之,所得愈少,用於 飲食費用支出比值愈大。恩格爾將物質生活水平類型分類如下: 物質生 貧困 活水平 R fit 溫飽 小康 寬裕 富裕 R>60% 50%<R≤60% 40%<R≤50% 30%<R≤40% R≤30% 恩格爾係數R= 飲食費支出總額 消費支出總額 X100% C ) 24. 如圖(十五),曉華將家裡去年的消費支出繪製成折線圖, 若依據恩格爾的理論,曉華家去年的物質生活水平為下列 哪一類? BR (A)溫飽 (B) 小康 (C)寬裕 (D) 富裕 100 287100 0.32 28/90 84 60 消費金額(萬元) 2086420 4 食衣住行娛其 圖(十五) 25. 已知某城鎮於西元2013年度的消費支出總額平均為32萬元,其中飲食費支出佔 了 62.5%,物質生活水平屬於貧困等級。若接下來該城鎮每年消費支出總額平均 增加1萬元,每年飲食費支出平均增加x萬元。政府於每3年重新計算該城鎮的 恩格爾係數,發現該城鎮的物質生活水準變化為貧困(2013年)、溫飽(2016年)、 溫飽(2019年)、小康(2022年),則x之值可能為下列何者? (A) 0.05 (B) 0.25 (C) 0.31 (D) 0.38 62.5 32 = 0.625 × 32 X=20 1250 1975

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數學 國中

求解,需要有算式

二、填充題:(每格4分,共40分) 1. 求下列各小題中比的比值: 100 63. (1)(-3):48的比值為 42 21 2. 甲、乙兩人帶相同金額的錢出門逛街,甲花了一半的錢買衣服,乙花了李的錢買鞋子,則甲剩下的錢:乙剩下的錢= 3:4. xD 6:8⇒3:4 <=4:9,則x=_ 3. (1) 已知号: x=4 2 (2)已知5q:46=3:16,則:b=3:20. 6x+17 x= 1b80a=a+b= 4. 如右圖,三角形ABC的面積:三角形 DEF的面積=56. ID=309x84 5. 若q:6=3:4,則(a+b):(b+2a)=11:10.36=4a (0+26):(b+2a) a=b=3:4. 11.10 6.已知棒球選手的打擊率是安打數與打擊數的比值,右表為甲、乙、丙三人的安打數與 打擊數資料,則 282 -36 選手 安打數 打擊數 甲 28 的打擊率最高。弟弟我 50 乙 23 40 丙 24 48 ° 小姐與大華第一次段考英語的分數比為8:5,數學的分數比為4。已知兩人兩科的總分均為136分,請回答下列問題: (1)小姐英語與數學的分數比為8:3 (2)大華的數學分數為 分。 三、計算題:(每題10分,共20分) 1.已知甲、乙兩根木棍的長度比為9:14,今將兩根木棍的其中一端對齊,發現兩根木棍 甲 : 長度相差10公分,如右圖所示,則甲、乙兩根木棍的長度和為多少公分? 解: 142-92=52 5r=10 ✓ =2 甲:18 乙:28 18+28:46 公分 2. 已知一號、二號兩倉庫都只有甲、乙兩種零件,且一號、二號倉庫的零件總數相同,一號倉庫中甲、乙零件的數量比為 4:5,二號倉庫中甲、乙零件的數量比為11:7。今將二號倉庫內的零件全部搬到一號倉庫,則一號倉庫中甲、乙零件的數 量比為何? 4K+5k=9h 11k+7k=18k 解: : 甲、乙 4r 5r 甲乙 卜:k=18:9 Ilk 7k ⇒2:1 8-2

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英文 高中

第三題為什麼要用現在式

打電 oever 這種 f T 1.L 第一部分:選擇題(60分) 、綜合測驗 「 說明:下面三篇短文共有15題,每篇各有5題,為第1-15題,每題2分,共30分,請依短文 | 文意,選出一個最適合該空格的答案。(合告:意去 閱讀下文,回答第1-5題 For baseball enthusiasts, the name Shohei Ohtani is more than familiar. Born in Iwate, Japan, this baseball legend played a key role in leading the Los Angeles Dodgers to the playoffs in 2024. He then MLB career, guided the team to defeat the New York Yankees in the World Series and earned the team its historic eighth championship. This victory also marked Ohtani's first championship in his seven-year making it his historic 1 2 both Ohtani is widely praised as one of the rare "two-way" players in modern sports, pitching and hitting. As a pitcher, his top speed reaches an impressive 165 km/h, a record among Japanese players, while his unpredictably changing pitches-especially his famous "devil forkball"-have given batters a tough time. As a hitter, he possesses exceptional power, along with a sprint speed that ranks in the top 10% of the Major League Baseball (MLB). In the 2024 regular season, he achieved an incredible "54 home runs and 59 steals," proving his unparalleled versatility and skill as a baseball player. 3 an immense amount of hard work and dedication. As However, behind Ohtani's success early as high school, he began using the "Mandala Chart" method to set and attain his goals. This approach starts with a central goal and branches out into eight related elements, forming a clear roadmap goal was to become "the top draft pick among all teams." To for improvement. At that time, his 4 make it, he set sub-goals such as "pitch control," "speed," "physical strength," and "character," working on each area to develop himself inside and out. 5. "that witte breaks With each record, fans believe that Ohtani has transcended even imaginary baseball heroes depicted in manga. He embodies the true essence of a real-life champion. 1. (A) material (B) mechanic (C) milestone (D) molecule 2. (A) appealing to (B) coping with AQ³. (A) lies (B) lying (C) excelling in (C) lay (D) struggling through (D) lain

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