276 questions for the full range of 3rd grade science.
You can learn important points of each textbook unit precisely by the authors who provide problems for classes and examinations to cram schools and junior high schools.
The content in line with the content of the textbooks is posted from the basic level, so it can be done in a short time and is optimal for confirmation just before the test.
The commentary on all questions deepens understanding and encourages the establishment of knowledge, and further serves as a bridge to studying for exams.
In addition, the history of each question is recorded as XX and points, which helps you find weak points.