There is something wrong with the animation equipment of colorful classroom courseware, so it cannot be played.

This colorful course is very good, that is, it is very helpful to choose the real questions in the exam, and especially for some students who are about to face the exam, it is a very good choice to choose this material to review, and it also gives very detailed answers, which can help you stare at the answers after doing the questions and help you do it.