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To break the blind spot to deal with a number of test sites to deepen or strengthen their own self-learning ability and migration, such as the 1994 National College Entrance (9) Question: If the complex number z satisfy 1 + I + I = a il: 2, NA me 【 ],[a little blind spot - with two fixed Fl, R is equal to the distance constant, not deep understanding IFlF2I 2a,[link widoczny dla zalogowanych], the fixed point of the path does not exist to associate the elliptic hyperbolic analogy: ① When {FlF,[link widoczny dla zalogowanych], J> 2 Ⅱ ,[link widoczny dla zalogowanych], the fixed point trajectory is hyperbolic; @ When lFl1 = 2 port, respectively,[link widoczny dla zalogowanych], fixed point locus is Fl, F2 as a starting point of two rays; ③ When IFlF2I <2a, the fixed point of the path does not exist in mathematics like this There are many test centers, pro forma should be noted when reviewing stretches to eliminate the blind spots Received Date :1999-12, a o8 Author: Liu character (L967 A), M, Jiang Xi Nankang people, Jiangmen City, Guangdong Province, one middle school Jianghai grade teacher, bachelor ■; head ZIf, Myanmar paradox, 2000, 10 cross sectional mathematical communication features shift 41 ⑨ Xi [_ Pu-sided Qi Shi Yin (Wu grab II. Hubei 430013) cross-section bow bow. /. Z China Classification No.: 0123 Document ID emu: E Article ID :0488-7395f2000 10 ~ 0041-03 to cut by a plane of a polyhedron, polyhedron Jiaocheng plane and the plane is a closed polygon, the polygon is a polyhedron cross-section we adopted the following examples to explain the cross section with faceted issues related to the determination of a cross-section and the section of graphical cross-section area of the problem first is to determine the shape of cross-section graph, which can generally be used and define the basic properties of planar surface conditions to solve: followed in this Based on the calculated cross-section area of the back Ifgll ~ 1.ASCD-A 'BCD is the edge length l, iE cube, BM = {Distillation, D'N =. _4 capture the hot spot in the review stage, in addition to attention in recent years Chang examination of the hot spots, but also capture a tear Shan knowledge, information and other hot tear problems, such problems have in recent years reflected in the college entrance examination such as the national college entrance examination since l998 in (18) questions the answer is not only open launch type questions, the 1999 National College Entrance (18) launch title fork assembly required with the given argument, \In addition to the opportunities and freedom, as well as the implementation of the question because of fruit rope (5), shopping is not the only problem (14), the combination of multiple choice questions (13), a comprehensive background and unique theme tear Ying denoted MN the median plane and the CC. ∞, DA intersection of the F, G, H, using the same method can be obtained: cF ={,(={={ under the \Intersection of intercepted parallel to each other, \1 answer mother, on the cut surface of the cube was known as a hexagonal cross section EmHU,, its three pairs of sides parallel and equal to .2) Let ABCD hexagonal EFGHU in the square on the bottom and the projection is:. GH | A. the S ~ Cr) 'ffst {×{×{= s prime {So = 1-2 = Xi Di 2 muscle cross-section shape of the count down rouge 2 (high sixth Cup hopes on a second try l995 ) through (20) These questions are examined not only feature rich, but also because of the pit, the form and degree of difficulty is relatively close to the actual candidates, the distinction between good, so much of social praise. capture similar to these hot spots, no questions to guess the college entrance examination , but only on an understanding of knowledge in these areas, the impression, especially related in part to have mastered the basics, some migration, while pro forma review of inspiration when we usually record to be torn to archery practice not on the title subject, application of mathematical knowledge to be good at analyzing and solving problems more than four valves, not all of the college entrance examination, as a candidate since I note that the bow is necessary. Received date :2000-02-3O Author: Qi Shi Yin (1946 a), male, yellow broken people in Hubei, Wuhan, two senior teachers