UGG Online Jiangsu college entrance math teacher accused of being difficult to flesh out the topic s

2, set to meet the complex number z z (2-3i) = 6 +4 i (where i is the imaginary unit), then the model is z ____________

■ Reflection: difficult exam guide is not good

mathematics curriculum and teaching in the research, the work involves: the philosophy of mathematics, methodology of mathematical thinking, mathematics teaching theory, theory of mathematics curriculum, mathematics education, evaluation, education, math (basic theory of modern mathematics, thinking, elementary mathematics, mathematics competitions), mathematical problem-solving, mathematical communication, etc.

□ Evening News correspondent Lining Yuan reports

(1) note x (unit: million) for the production of an A and a B product gross profit product availability, find out the distribution of x

(2) production of four seeking a product obtained by the probability of profit less than $ 100,000

(2) For any positive integer n, is rational confirmation cos-nA

(1) verify cosA is rational

■ scoring team of experts: to be difficult with the hard

Professor James, to the right of this paper to make a scientific evaluation, is still too early to make judgments on the papers should be in the paper reviewers, based on the distinction between the candidates and difficulty scores situation, draw a comprehensive scientific evaluation of the right. The difficulty of examination papers are equal to each candidate, especially this year, liberal arts science separate crossed, there is no cross, there is no science candidate or candidates to take advantage of liberal arts. More difficult with the hard, from the selection point of view there is no problem.

Jiangsu mathematics college entrance examination papers scoring team of experts, Professor Tu Rong Bao told reporters,UGG Online, this knowledge of mathematical papers point coverage is wide, reflecting the syllabus requirements. Volume There are many mathematical innovations, innovative problem more, reflecting the ability of candidates to the requirements of this country to develop creative talents and goals.

after losing a lot of skill to master's candidates summed up as less experienced. > But some students think this way, the hand does not meet the essence of quality education. flesh out the Nanjing Normal University, Associate Professor of Mathematics and Computer Science, Master Instructor, China Mathematical Olympiad senior coach, .

Mathematical Ge Ge Jun screen shots

■ human flesh search According to the results of users out of human flesh, a man named Mop & Veg Forum on users post, said, according to statistics this bit called philosophy of mathematics, mathematical thinking methodology, mathematical problem-solving, mathematical communication, etc. Some Internet users even Friends In 2010, Jiangsu college entrance math problem out by him again.

■ Over the years, the college entrance examination entrance mathematics are considered to be the stumbling block, many candidates talk about a few pale, this year is no exception. According to reports, Jiangsu Province in 2003 college entrance examination in mathematics is considered to be difficult to roll the volume benchmark, the average was 150 minutes of test paper is divided into 68 points. The invigilator, Nanjing has seen the paper concluded that the difficulty of this year's math exam has gone beyond 2003, called the most difficult. This is perplexing to many of the candidates in Jiangsu. According to local media reports, even the candidates an examination room to cry, he kept saying that

yesterday, one called called

22, (10 points) of a plant A, B and two products, a product of the first grade was 80%, 20% second product; B was first quality products 90% of the second product was 10%. A production of a product, if first-class products can be profitable $ 40,000, if the second product is a loss of 1 million; production of a B product, first-class products can be profitable if the $ 60,000 if the second product will have loss of 2 million. Set up the production of various items independent of each other

network of posts is then reproduced to the major sites, many users came to onlookers, and there are a lot of empathy and leaving reflections. And on the

Jiangsu college entrance math questions 2010 excerpt

Time to start a discussion on the exam, over the years known as the Jiangsu candidates reflect the current number of Internet entrance is very difficult mathematics questions, and even crying with candidates leave the examination room. Two days, users launched a paper on the mathematics of human flesh search of those propositions, and for sealing the . According to an online survey questionnaire, as of yesterday afternoon, nearly ten thousand votes in the 73.5% that the papers have been difficult, other provinces in the country the highest proportion of papers.

23, (10 points) long known as the tripartite △ ABC rational

3, the box has the same size 3 ball, a black ball, to work out if random from two balls, two balls of different colors probability ______________

4, a group of cotton in order to understand the quality of cotton, from which a random sample of 100 cotton fiber length (the length of the cotton fiber is an important indicator of the quality of cotton), the data are in the interval [5.40] , its frequency distribution histogram shown, then the sample of 100, there are ___ roots in the cotton fiber length is less than 20mm.