Among them, tangent of circle, vertical diameter theorem of circle, lateral area of cone, trigonometric function, quadratic function, dynamic problems of quadratic function, the combination of quadratic function with linear function and circle, and the combination of circle with linear function (tangent) are difficult to apply.

Physics: key points: one chapter on internal energy and one chapter on mechanical work (there must be calculation questions in the senior high school entrance examination! ! ), ohm's law (calculation questions in the senior high school entrance examination), electric power, household circuits (pay attention to drawing questions), and the concept of energy conversion should be clarified (pay attention to "whose physical quantity", the senior high school entrance examination is required! ! )

Chemistry: key points: familiar with the basic concepts of atoms, molecules and ions, very familiar with valence! ! The balance of equations should be practiced, and the properties of metals, acids, bases and salts should be summarized (very useful). The solubility curve should be understood, the solubility of various substances should be remembered (as long as they are soluble or insoluble), and the basic reaction types should be clear.

Friendly reminder: the teacher will remind you of important knowledge points, listen carefully, go back and practice more, science is unskilled and messy. Please forgive me. .

I hope it helps you,