As for the choice of fill-in-the-blank questions, except for a few questions, most of the questions in the second volume of the country are very basic, which is similar to that in the third volume of the country. The calculation of analytic geometry and solid geometry in the national 1 volume is large. However, the two volumes of innovative test questions are more novel than the national 1. From the Lagrangian approximate solution of last year's two volumes, I feel that I have more basic ability to cultivate numerical methods of physics in science and engineering than to examine the height of Venus. Questions 3, 4 and 12 in two volumes in 20 years all test students' on-the-spot coping ability, reading comprehension ability and novel background but knowledge base. The 20-year-old 1 volume has no bright new questions except the third pyramid.

Judging from the answers, the questions 17, 18 and 19 in the second volume of China are very simple. Usually, as long as you listen carefully in class, it is not a problem to get full marks. However, if the number of questions in Volume 2 17 is 1, it will take much more time to find the wrong order than that in Volume 2 17. As for questions 20 and 2 1, I feel equally divided. 1 Volume 20 is an elliptic analytic geometry problem with strong skill. If Vieta's theorem is applied, it may require a lot of calculation. The problem of 2 1 is a problem of finding the parametric equation of the constructor. The 20 questions in the second volume are solid geometry questions to examine students' spatial thinking ability. The 2 1 question is a change from the previous math quiz. The original competition question is only proved by the third question. If the first two questions of the college entrance examination are oriented, it is not difficult to solve the third question. In addition, the 2 1 topic also thoroughly investigates the symmetry, periodicity and range of trigonometric functions.

Anyway,

Compared with the national 1 volume, the basic questions are more basic, but there are also some innovative questions and high-level questions. Highlight the cultivation of foundation+ability. However, if the national paper is 1, the calculation of questions with the same difficulty is large, requiring students to answer questions quickly. Easy to win. I feel that 1 volume is a little more difficult than 2 volumes, but 3 volumes are far simpler than 2 volumes (digression).