Sources and Production Policy
This quiz is independently created by this site. It is not affiliated with any specific textbook, workbook, drill, test, publisher, or textbook series.
Creation policy: Questions, choices, explanations, order, and diagrams are created from general curriculum topics and basic scientific knowledge. We do not copy or lightly rewrite textbook, workbook, drill, or test questions.
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Internal production rules
- Do not create questions while looking at textbook or workbook questions.
- Do not rewrite existing questions by changing only numbers, wording, diagrams, or answer choices.
- Create each question, explanation, and diagram independently.
- Use only self-made images or materials with confirmed licenses.
- Before publication, review for similarity, accuracy, and copyright risk.
- If a rights holder contacts us, temporarily hide the relevant content, investigate it, revise or delete it, and seek professional advice if needed.
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