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英文 高中

想問12,為什麼不是B是D?

1.. 試卷 考科 ment I the 參考試卷 英文考科 第11至15題為題組 elaborate 19 •fictional 第2頁 共10頁 April Fools' Day, one of the most light-hearted days of the year, has an unclear origin. Some see it as a celebration related to the turn of the seasons from winter to spring; others, however, believe that it 11 the adoption of a new calendar. Ancient cultures celebrated New Year's Day on or around April 1, which roughly coincides with the beginning of spring. In 1582, Pope Gregory XIII ordered a new calendar, which called for New Year's Day to be celebrated on January 1. However, many people, either refusing to accept the new date or not having heard about it, to celebrate New Year's Day on April 1. Other people began to make fun of these traditionalists, sending them on "fool's errands" or trying to fool them into believing something false. 13, the practice spread throughout Europe and the rest of the world. 12 Nowadays, on April Fools' Day, people often 14 to create elaborate hoaxes to fool others. Newspapers, radio and TV stations, and websites have participated in the April 1 tradition of making 15 reports in order to fool their audiences. The BBC once reported that Swiss farmers were experiencing a spaghetti crop and showed scenes of people harvesting noodles from trees. Guess what? A great number of viewers were fooled. (A) leads to (B) brings out DB(A) continue (B) continuing (C) stems from (C) to continue (D) comes across B 13. (A) Precisely (B) Eventually (C) Additionally buy B(A) come to an end (B) go to great lengths AS 15. (A) fictional 第16至20題為題組 (B) essential (C) put in service (C) ancient (D) continued (D) Literally (D) hold in store (D) subjective

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自然科學 大學

為什麼[A(org)]=n[An(org)]成立 (第三張圖equation 7.9) 感謝

Experiment 7 Experiment 7 The partition of Organic acid between Water and Organic solvent Objectives Understand the partition of a solute between two immiscible solvents. Introduction A chemical analysis that is performed primarily with the aid of volumetric glassware (e.g., pipets, burets, volumetric flasks) is called a volumetric analysis. For a volumetric analysis procedure, a known quantity or a carefully measured amount of one substance reacts with a to-be-determined amount of another substance with the reaction occurring in aqueous solution. The volumes of all solutions are carefully measured with volumetric glassware. The known amount of the substance for an analysis is generally measured and available in two ways: 1. As a primary standard: An accurate mass (and thus, moles) of a solid substance is measured on a balance, dissolved in water, and then reacted with the substance being analyzed. 2. As a standard solution: A measured number of moles of substance is present in a measured volume of solution - a solution of known concentration, generally expressed as the molar concentration (or molarity) of the substance. A measured volume of the standard solution then reacts with the substance being analyzed. The reaction of the known substance with the substance to be analyzed, occurring in aqueous solution, is generally conducted by a titration procedure. The titration procedure required a buret to dispense a liquid, called the titrant, into a flask containing the analyte. A reaction is complete when stoichiometric amounts of the reacting substances are combined. In a titration this is the stoichiometric point. In this experiment the stoichiometric point for the acid-base titration is detected using a phenolphthalein indicator. Phenolphthalein is colorless in an acidic solution but pink in a basic solution. The point in the titration at which the phenolphthalein changes color is called the endpoint of the indicator. Indicators are selected so that the stoichiometric point in the titration coincides (at approximately the same pH) with the endpoint of the indicator.

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