Dear users of Digital Sulfuric Acid APP:

The Xiaoli Practice module of the Digital Sulfuric Acid APP has previously affected users' learning experience due to the lack of question explanations. At the end of March, we carried out a comprehensive upgrade of the question bank, fixed all existing issues, and added detailed answer explanations. This update deleted all the original questions and re-uploaded a set of question banks that have been reviewed multiple times.

Highlights of this upgrade:

1.1 More comprehensive coverage: It now comprehensively covers the four major categories of safety, process, equipment, and electrical instrumentation, closely aligning with actual working scenarios, making learning more targeted and allowing for directed study.

1.2 Larger question volume: The question bank now contains over 3,000 questions (we will continue to increase the number of questions), including multiple-choice, multiple-answer, and true/false questions, providing rich content and making learning more convenient.

1.3 Clear explanations: Each question is accompanied by a detailed answer explanation, helping learners understand the questions and master the knowledge, thus saying goodbye to the confusion of "knowing the answer but not the reason behind it."

2. To ensure the consistency of the new question bank with user data and the stability of the user experience, we have cleared the user's historical data, which specifically includes: exercise records, error books, my collections, examination records, etc. We are well aware that these learning records carry the user's learning accumulation and efforts. We sincerely apologize for this.

3. After the question bank is updated, all users will start recording their learning trajectories from the new question bank. To help everyone get started quickly, we have compiled the following core function introductions for your reference:

3.1 Practice Record: Automatically saves your every practice session, allowing you to review your learning progress at any time.

3.2 My Mistakes: Automatically collects the wrong questions, facilitating targeted consolidation of weak knowledge points.

3.3 My Favorites: For key and difficult questions, you can click to save them, building an exclusive question bank.

3.4 Mock Exams: The question bank randomly generates questions to help you test your mastery of the knowledge, identifying and filling in the gaps.

3.5 Exam Records: The scores and details of each mock exam are automatically archived, making it convenient to track learning effectiveness.

If you find any errors in the questions or have questions about the explanations during use, you can leave a message on the official account's backend or add to the WeChat group for feedback. We will handle it promptly.

In the future, we will continuously optimize the quality of the question bank, add new question types and increase the quantity of questions, and configure more professional answer explanations to provide users with more reliable and practical learning tools.