Chemistry: Elective 4 Key Points+Difficulties (last semester)+Elective 3 and 5 (next semester)
Physics: Elective 3- 1, 3-2 key points+difficulties (last semester)+Elective 3-4 simple.
Mathematics: compulsory 5, elective 2- 1 series, analytic geometry is always difficult to say = =, and it's okay to practice more.
Take 2-2, take 2-3 derivative and counting principle, and it should be no problem to do the problem carefully.