年級

問題的種類

自然 國中

增加催化劑是等於增加接觸面積嗎?我看到有一題是說「二氧化錳的添加會增加接觸面積導致反應速率快」,二氧化錳是催化劑啊,所以增加催化劑的量就等於增加接觸面積?那為什麼這題的C是錯的?

天然 聚合物區 ABCD 雙氧水分解時,以二氧化錳當催化劑可加至400- 速化學反應。阿凱想了解二氧化錳的添加 VQ量,是否會影響氧氣生成的速率,實驗結 積 300- 重量: 114 升高中綜合版 ~2冊(一)】解答 入口 圖(六) 三膜 網狀聚合 膜- 鏈狀聚合物 甲 P 果如圖(三)所示。根據圖示,二氧化錳添加 量不同造成實驗結果有差異的原因,與下 列哪一個影響反應速率的現象最為相似? 200- 100- (A)天氣熱容易使食物腐敗⇒溫度对反应速率の影響 (B)把免洗筷削成火媒棒更容易點燃MnO2更多→接处面变大 40 (C)唾液中的澱粉酶可加速澱粉分解→催化反应速率。影響 加增加 (D)升高溫度有助於2NO2=NOg+熱量反應向左進行 ABCO、40 小櫻拿到一個有趣的科學玩具——浮沉子 (如圖(三)) , ⑨的,水並不會進一點玩法如下: ,浮沉子是塑膠材質且封閉 寶特瓶中加水後 蓋. 時浮沉子浮在水 空水 -空氣 面 步驟一:將浮 使浮沉 80 二氧化錳添加量 20公克 (-1.0公克 0.4公克 --0.2公克 120 160 時間(秒) 圖(三) 溫度改变反应平衡 圖(三) 園 (程度是指都市人口占總人口的比(A 「市人口成長明顯較鄉村人口高一(還是 「適的都市人口變動不明顯,但服村人口 「國此答棗應為(A): 於臺灣北部,三面皆有山地環境, 一過巷口,且能連結國道)、3號車標 貨物和人員的交流 冬季的漁獲,此時高氣壓位在亞 迪利亞一帶,亦可由(B)圖中約 「太平洋海面上有高氣壓,亞洲 [夏季 (C)滯留鋒在臺灣附地 播雨率:(D)臺灣附近海域有 歐之際 (道) 主要為大屯火山群,小 山為火山活動所形成 活動,故選(A). 真,距離約為3公 ~560m之間。(Dis

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英文 國中

這個圖表為什麼有兩個一樣的問題,但是不一樣的結果

(33~35) People in Taiwan never worry about getting hungry at night when there is nothing at home. They can walk to the convenience stores and get anything they want. In fact, in Taiwan, it is not possible that people fail to find a convenience store because it is part of our life. Convenience stores are working 24/7. In other words, finding a place to sit down and take a rest anytime is a piece of cake. In order to grow business, shopkeepers use some smart ways to have the buyers spend more. First, they put the most popular items at the buyers' eye level to let them see the items easily and often. Second, they drive the buyers to buy something cheap and small without thinking too much or give shoppers a special offer like "Buy One And Get One Free." Third, they try to have the buyers stay at the convenience stores as long as possible by setting up a seating area. They think the buyers will buy one drink after another once they stay longer. In a study, 73 teenagers answer two of the questions. The pictures below show their interesting answers. Which of the following do you like? The taste of the foods. The service. The prices of the products. The feelings in the convenience stores. 46 (63%) 132 (43.8%) |12(16.4%) (21 (28.8%) The polite clerks. 16(8.2%) The special offer. |14 (19.2%) The way of showing the products. 121 (28.8%) 0 10 20 30 40 50 Which of the following do you like? The taste of the foods. 18 (24.7%) The service. 11(15.1%) The prices of the products. 40(54.8%) The feelings in the convenience stores. 18(11%) The polite clerks. 29 (39.7%) The special offer. 19(12.3%) The way of showing the products. 17(9.6%) 10 20 30元 40 convenience store 便利商店 level高度 offer 優惠 result 結果 product 商品 46 132 50 A B

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