If there is really no idea when making multiple-choice questions, there is a kind of "folk prescription" called C, and the teacher seems to prefer to put the correct answer in C option. However, in the real and simulated questions of the senior high school entrance examination over the years, the proportion of each option is relatively balanced. For example, from 20 1 1 to 20 15, we can see that in the reference answer, C is the least, only appearing three times, which is obviously less than other options.
Matters needing attention in college entrance examination mathematics
Simplifying the complex problem in the math problem of the college entrance examination is to decompose a complex problem into a series of simple problems, divide the complex figure into several basic figures, find similarities, find right angles, find special figures and solve them slowly. College entrance examination is graded step by step. This way of thinking is particularly important. If you can count first, you can score by stepping on the main points. Even if the conclusion can't be reached, there are still many points in the middle.
The problem of motion is static. For dynamic graphics, first find the unchangeable line segments and angles, and whether there are always equal line segments, always congruent graphics and always similar graphics. All operations are based on them. After finding the relationship between the changing line segments, solve it slowly with algebra.
General problems are specialized, and some general conclusions cannot be solved. First look at special cases, such as the moving point problem, and see how it moves to the midpoint, how it moves to the vertical, and how it becomes an isosceles triangle. Find out the conclusion first, and then solve it slowly.
In addition, there are some details to pay attention to. Trigonometry is better, as long as there is a right angle, you can use it. From the point of view of simplifying operation, trigonometry is better than proportional formula and Pythagorean theorem. There won't be too many calculation obstacles in the senior high school entrance examination proposition. If you encounter complicated operations, you should turn back in time to avoid going into a dead end.