1. The test questions are closely related to the "Double Basis", with moderate difficulty and scattered difficulty. 2. Cultivate students' ability to transfer knowledge and solve practical problems by using double bases. In particular, the weight of situational questions is heavier than before. Although these problems originated from textbooks, they were transferred to life and social science and technology through the knowledge in textbooks. 3. The experimental questions pay more attention to the examination of thinking ability. There are five experimental questions in the whole volume. Originally, this kind of questions tested the standard operation more, but now they pay more attention to logical thinking ability such as positive thinking and reverse thinking. This is consistent with the goal of the current new curriculum standards. In addition, the test questions pay more attention to the safety and greenness of the experiment. 4. The test questions do not give up the traditional classic questions, but are reflected in the ability to examine, which is consistent with the proposition of the college entrance examination. 5. The chemical calculation problem is no longer the final problem, which is not difficult, but it combines the calculation problem with other knowledge to examine students' emotional attitude and values.

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1. Implement "Double Basis" and try to combine chemical knowledge with life experience. If conditions permit, it is best to let students do the experiment again, especially the students' experiment. If there are abnormal phenomena, students analyze them themselves. 2. Calculation questions should be standardized according to the difficulty of teaching materials, and combined with other plate knowledge for appropriate training. 3. Pay attention to chemical terms and combine some related concepts and experiments.