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OS
架构x64,x86
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OS
架构x64,x86
描述
This edition has 4 Levels to start you off and an Editor, which allows you add and edit the levels.
Learn to write chemical formulas by dragging and dropping or double-clicking the ions.
The Test Mode randomly selects ions from the Level you have chosen. To Make the Test More Challenging: * Include or exclude Atom Counting Questions, * Testing can be done with or without the extra pressure of time, * You can set how long the timed test will run for, * Hide or Show the positive and / or negative ions
A Top Scores window shows the best scores to date.
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