京东 11.11 红包
CAIE 2021年6月AS化学选择题答案和解析 9701_s21_qp_12
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s21_qp_13_q12
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[AS Chem] I-1_mole定义相关问题(2)_9701_s20_qp_11_q11
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AS化学讲题(I-4 to I-4)_曹D
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AS化学实验_Running an acid base titration analysis (phenolphthalein as indicator)
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[AS化学] I-2 笔记题2021_连续电离能问题
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[AS化学] I-2 笔记题2021_同一主族元素第一电离能变化趋势和原因
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[AS化学] I-3 Chemical bonding复习课(III)
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[AS化学] I-2 MCQ 19-21 Q7(sub-atomic particles数量的分析问题_1)
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II-1 MCQ 19-21 Q17
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[AS化学] IV-4_IR Spectroscopy Background
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II-3 MCQ 19-21 Q7
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A Level Chemistry – March 21 – 9701 Paper 22 - Step-by-step tutorial
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IGCSE Physics Paper 0625_M22_QP_42_Full solution with Detailed Explanation
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Topic 12 nitrogen and sulfur STR 16-18习题讲解
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II-1 MCQ 19-21 Q14
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[IG化学笔记题] Extraction of Al and Zn
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[AS化学] I-2 MCQ 19-21_Q20_电子排布问题4
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[AS化学] I-2 MCQ 19-21 Q18_电子排布问题2
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CAIE IGCSE Physics (0625) Solved Paper 4-February March 2021 P42 Full Solution
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[AS化学] I-2 MCQ 19-21_Q25_电子排布问题9
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AS化学实验_How to read a burette
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[AS化学] I-2 MCQ 19-21_Q26_电子排布问题10
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[IG化学笔记题] Topic 12 non-metal compounds
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[AS化学] I-2 MCQ 19-21_Q24_电子排布问题8
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[AS化学] I-2 MCQ 19-21_Q22_电子排布问题6
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II-4 MCQ 19-21 Q4
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II-1 MCQ 19-21 Q17
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II-3 MCQ 19-21 Q14
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I-1 Moles and calculations-问题解答(1)_s21/qp/23/q1
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U4 Ch12 Entropy and lattice energy MCQ 2018 Q4-Q7
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Using a gas syringe to measure volumes of gases (2.1 and 7.3)
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[AL化学] Ch29_¹H NMR Spec Spectra Interpretation Part II
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[AL化学] Ch29_¹H NMR_Spectra Interpretation_Part I Examples
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[AS化学] I-2 Atomic structure MCQ 19-21 Q9(sub-atomic particles的数量问题_2)
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IV-1 Alkane and alkene(1) - Isomers of alkane
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【初中化学218集】一口气带你学完初中化学所有知识！动画版 趣味满满 全程干货 从小白速成学霸！国庆假期成为卷王！再也不怕返校月考啦
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II-4_Kp_MCQ_Drill1_Q1
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II-4 Kc and Expression MCQ Drill 1 Q4
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Acid-Base Titration Curves (Ch21)
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II-2 Part D Hess's law MCQ 02-18 Q25-Q44 (ykx and gzp)习题课