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Chapter 21 The new big customer of the meat stall
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Chapter 23 Mrs. Chen's new car
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... is proficiency.
Then the next step is to continue to study the questions, because he found that even if he has mastered all the knowledge in high school, doing these high school questions can still increase his proficiency.
One question, 5 proficiency levels.
Glance at the question, and the idea of solving the problem automatically comes to mind, and write down the problem-solving process in a smooth and smooth manner.
In less than twenty seconds, 5 profici ...
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