Do the following three main points: 1 find out the weak. Review process is to sum up the knowledge on the one hand, make the knowledge more coherent system and regularity, but also let the students themselves, looks up the deficiencies. So, we teachers to understand the students ' knowledge of the situation prior to the review, students not only found widespread deficiencies, but also some shortcomings, for these well designed programs, reasonable arrangement of time, this review is more targeted and more effective. For example, you can design a form for investigation, understanding students ' weaknesses in each knowledge, put it as a review of key, combined with the problem of textbooks to review, both to avoid casting a net tihaizhanshu, and improve the efficiency of review. 2, good collation. Through six years of study, students in the basics, reading method, exercises, and so already have a certain degree of accumulation, the review stage, teachers should know how to guide the students to label the accumulation, process, form a system of knowledge networks. Exercises for students to be representative, \ning a method, class of pass was to get \s. 3, pay attention to use. The accumulation of knowledge is ultimately to use, therefore, review the situation and life situation to be created in a variety of languages, guide students on the basis of the previous accumulation of knowledge to use to the maximum, and really apply what they have learned. Second, review the content and strategy of the first part: the basics (a) 1, review the main points of Hanyu Pinyin is able to recite and write down the alphabet of Hanyu Pinyin; accurate spelling pronunciation (after reading cacuminal, nasal sound, light, and retroflex sounds), the correct write consonants, vowels and syllables. 2,. main types according to the order of the alphabet of Hanyu Pinyin alphabetical order; fill in the appropriate uppercase and lowercase letters; see phonetic writing words; pinyin to write sentences with dot to select the correct pronunciation of the word; to bring some initial consonants or vowels, word selection. Second, the main types of words (1) Ruby written words; (2) to bring Word to select the correct pronunciation; (3) use a sequencer and radical character lookup method知识决定命运 百度提升自我
=-
3428 (x-)+ （2分） 233∵x=
4在x的允许值范围内 384时，y最大值为 （2分）
3384米，高2米时，窗户的透光面积最大，最大面积是平方米。（1分）
33∴当x=
答：当窗框的宽为
23、（本小题满分12分）
解：（1）连结BP
先证OM是⊿APB的中位线
所以PB=2OM=4 （2分） 由勾股定理求得AO=2∴P（2
3 （2分）
3，4）而C（0，-2）
3 x-2（2分）
用代定系数法求得直线PC的解析式为y=2（2）连结BM
先求∠AMB=120°再求扇形MAB的面积=
16∏ （1分） 3⊿ABM的面积=4
3 （1分） 16∏-43 （1分） 3∴弓形ACB的面积=
由AP是直径得⊿ACP是直角三角形 AC=2，PC=4
3 （2分）∴⊿ACP的面积=83 （1分）
24、（本小题满分12分）
解：（1）令y=0，解得x1??1或x2?3（1分） ∴A（-1，0）B（3，0）；（1分）
将C点的横坐标x=2代入y?x?2x?3得y=-3，∴C（2，-3）（1分） ∴直线AC的函数解析式是y=-x-1 （1分）
（2）设P点的横坐标为x（-1≤x≤2）（注：x的范围不写不扣分） 则P、E的坐标分别为：P（x，-x-1），（1分）
2Do the following three main points: 1 find out the weak. Review process is to sum up the knowledge on the one hand, make the knowledge more coherent system and regularity, but also let the students themselves, looks up the deficiencies. So, we teachers to understand the students ' knowledge of the situation prior to the review, students not only found widespread deficiencies, but also some shortcomings, for these well designed programs, reasonable arrangement of time, this review is more targeted and more effective. For example, you can design a form for investigation, understanding students ' weaknesses in each knowledge, put it as a review of key, combined with the problem of textbooks to review, both to avoid casting a net tihaizhanshu, and improve the efficiency of review. 2, good collation. Through six years of study, students in the basics, reading method, exercises, and so already have a certain degree of accumulation, the review stage, teachers should know how to guide the students to label the accumulation, process, form a system of knowledge networks. Exercises for students to be representative, \ning a method, class of pass was to get \s. 3, pay attention to use. The accumulation of knowledge is ultimately to use, therefore, review the situation and life situation to be created in a variety of languages, guide students on the basis of the previous accumulation of knowledge to use to the maximum, and really apply what they have learned. Second, review the content and strategy of the first part: the basics (a) 1, review the main points of Hanyu Pinyin is able to recite and write down the alphabet of Hanyu Pinyin; accurate spelling pronunciation (after reading cacuminal, nasal sound, light, and retroflex sounds), the correct write consonants, vowels and syllables. 2,. main types according to the order of the alphabet of Hanyu Pinyin alphabetical order; fill in the appropriate uppercase and lowercase letters; see phonetic writing words; pinyin to write sentences with dot to select the correct pronunciation of the word; to bring some initial consonants or vowels, word selection. Second, the main types of words (1) Ruby written words; (2) to bring Word to select the correct pronunciation; (3) use a sequencer and radical character lookup method E（(x,x2?2x?3)（1分）
∵P点在E点的上方，PE=(?x?1)?(x2?2x?3)??x2?x?2（1分） ∴当x?19时，PE的最大值=（1分） 24（3）存在4个这样的点F，分别是F,0),F2(?3,0),F3(4?7),F4(4?7)(4分) 1(1
Do the following three main points: 1 find out the weak. Review process is to sum up the knowledge on the one hand, make the knowledge more coherent system and regularity, but also let the students themselves, looks up the deficiencies. So, we teachers to understand the students ' knowledge of the situation prior to the review, students not only found widespread deficiencies, but also some shortcomings, for these well designed programs, reasonable arrangement of time, this review is more targeted and more effective. For example, you can design a form for investigation, understanding students ' weaknesses in each knowledge, put it as a review of key, combined with the problem of textbooks to review, both to avoid casting a net tihaizhanshu, and improve the efficiency of review. 2, good collation. Through six years of study, students in the basics, reading method, exercises, and so already have a certain degree of accumulation, the review stage, teachers should know how to guide the students to label the accumulation, process, form a system of knowledge networks. Exercises for students to be representative, \ning a method, class of pass was to get \s. 3, pay attention to use. The accumulation of knowledge is ultimately to use, therefore, review the situation and life situation to be created in a variety of languages, guide students on the basis of the previous accumulation of knowledge to use to the maximum, and really apply what they have learned. Second, review the content and strategy of the first part: the basics (a) 1, review the main points of Hanyu Pinyin is able to recite and write down the alphabet of Hanyu Pinyin; accurate spelling pronunciation (after reading cacuminal, nasal sound, light, and retroflex sounds), the correct write consonants, vowels and syllables. 2,. main types according to the order of the alphabet of Hanyu Pinyin alphabetical order; fill in the appropriate uppercase and lowercase letters; see phonetic writing words; pinyin to write sentences with dot to select the correct pronunciation of the word; to bring some initial consonants or vowels, word selection. Second, the main types of words (1) Ruby written words; (2) to bring Word to select the correct pronunciation; (3) use a sequencer and radical character lookup method知识决定命运 百度提升自我
解：（1）令y=0，解得x1??1或x2?3（1分） ∴A（-1，0）B（3，0）；（1分）
将C点的横坐标x=2代入y?x2?2x?3得y=-3，∴C（2，-3）（1分） ∴直线AC的函数解析式是y=-x-1 （1分）
（2）设P点的横坐标为x（-1≤x≤2）（注：x的范围不写不扣分） 则P、E的坐标分别为：P（x，-x-1），（1分） E（(x,x2?2x?3)（1分）
∵P点在E点的上方，PE=(?x?1)?(x2?2x?3)??x2?x?2（1分） ∴当x?19时，PE的最大值=（1分） 24（3）存在4个这样的点F，分别是F,0),F2(?3,0),F3(4?7),F4(4?7) 1(1
k的图象上 xk5有5?，即k?5 ∴ 反比例函数的解析式为y?（3分）
1x17、解：（1）∵ 点A（1，5）在反比例函数y?又∵ 点A（1，5）在一次函数y?3x?m的图象上 有5?3?m ∴ m?2
∴ 一次函数的解析式为y?3x?2（6分）
Do the following three main points: 1 find out the weak. Review process is to sum up the knowledge on the one hand, make the knowledge more coherent system and regularity, but also let the students themselves, looks up the deficiencies. So, we teachers to understand the students ' knowledge of the situation prior to the review, students not only found widespread deficiencies, but also some shortcomings, for these well designed programs, reasonable arrangement of time, this review is more targeted and more effective. For example, you can design a form for investigation, understanding students ' weaknesses in each knowledge, put it as a review of key, combined with the problem of textbooks to review, both to avoid casting a net tihaizhanshu, and improve the efficiency of review. 2, good collation. Through six years of study, students in the basics, reading method, exercises, and so already have a certain degree of accumulation, the review stage, teachers should know how to guide the students to label the accumulation, process, form a system of knowledge networks. Exercises for students to be representative, \ning a method, class of pass was to get \s. 3, pay attention to use. The accumulation of knowledge is ultimately to use, therefore, review the situation and life situation to be created in a variety of languages, guide students on the basis of the previous accumulation of knowledge to use to the maximum, and really apply what they have learned. Second, review the content and strategy of the first part: the basics (a) 1, review the main points of Hanyu Pinyin is able to recite and write down the alphabet of Hanyu Pinyin; accurate spelling pronunciation (after reading cacuminal, nasal sound, light, and retroflex sounds), the correct write consonants, vowels and syllables. 2,. main types according to the order of the alphabet of Hanyu Pinyin alphabetical order; fill in the appropriate uppercase and lowercase letters; see phonetic writing words; pinyin to write sentences with dot to select the correct pronunciation of the word; to bring some initial consonants or vowels, word selection. Second, the main types of words (1) Ruby written words; (2) to bring Word to select the correct pronunciation; (3) use a sequencer and radical character lookup method （2）由题意可得
55??x?1x???y???21 解得?或?3 x?y?5?1???y?3x?2?y2??3∴ 这两个函数图象的另一个交点的坐标为(?,?3)（8分）17
23、解：⑴ y＝(x－50)? w
＝(x－50) ? (－2x＋240)
2
＝－2x＋340x－12000，
2
∴y与x的关系式为：y＝－2x＋340x－12000． ……………………3′
2
⑵ y＝－2x＋340x－12000
2
＝－2 (x－85) ＋2450，
∴当x＝85时，y的值最大． ………………………6′
2
⑶ 当y＝2250时，可得方程 －2 (x－85 )＋2450＝2250． 解这个方程，得 x1＝75，x2＝95． ………………………8′
根据题意，x2＝95不合题意应舍去．
∴当销售单价为75元时，可获得销售利润2250元． …………………10′
2、如图，AC是⊙O的直径，BD是⊙O的弦，EC∥AB交⊙O于E，则图中与有（ ）
A、2个 B、3个 C、4个 D、5个 3、“圆材埋壁”是我国古代著名数学著作《九章算术》中的一问题：“今有圆材，埋在壁中，不知大小，以锯锯之，深一寸，
个锯
531∠BOC相等的角共2道长一尺，问径几何？”此问题的实质就是解决下面的问题：“如图，CD为⊙O的直径，弦AB⊥CD于点E，CE=1，AB=10，求CD的长”。根据题意可得CD的长为 。
24、 如图，一次函数y?ax?b的图像与反比例函数y?Dk的图xAOEBCDo the following three main points: 1 find out the weak. Review process is to sum up the knowledge on the one hand, make the knowledge more coherent system and regularity, but also let the students themselves, looks up the deficiencies. So, we teachers to understand the students ' knowledge of the situation prior to the review, students not only found widespread deficiencies, but also some shortcomings, for these well designed programs, reasonable arrangement of time, this review is more targeted and more effective. For example, you can design a form for investigation, understanding students ' weaknesses in each knowledge, put it as a review of key, combined with the problem of textbooks to review, both to avoid casting a net tihaizhanshu, and improve the efficiency of review. 2, good collation. Through six years of study, students in the basics, reading method, exercises, and so already have a certain degree of accumulation, the review stage, teachers should know how to guide the students to label the accumulation, process, form a system of knowledge networks. Exercises for students to be representative, \ning a method, class of pass was to get \s. 3, pay attention to use. The accumulation of knowledge is ultimately to use, therefore, review the situation and life situation to be created in a variety of languages, guide students on the basis of the previous accumulation of knowledge to use to the maximum, and really apply what they have learned. Second, review the content and strategy of the first part: the basics (a) 1, review the main points of Hanyu Pinyin is able to recite and write down the alphabet of Hanyu Pinyin; accurate spelling pronunciation (after reading cacuminal, nasal sound, light, and retroflex sounds), the correct write consonants, vowels and syllables. 2,. main types according to the order of the alphabet of Hanyu Pinyin alphabetical order; fill in the appropriate uppercase and lowercase letters; see phonetic writing words; pinyin to write sentences with dot to select the correct pronunciation of the word; to bring some initial consonants or vowels, word selection. Second, the main types of words (1) Ruby written words; (2) to bring Word to select the correct pronunciation; (3) use a sequencer and radical character lookup method知识决定命运 百度提升自我
像交于M、N两点。
（1）利用图中条件，求反比例函数和一次函数的解析式；
（2）根据图像写出使反比例函数的值大于一次函数的值的x的取值范围。(7分) （1）y=
M（2，m） y 4,y=2x-2; （2）x＜-1或0＜x＜2 xO x N（-1，-4）
25、挂钟分针的长10厘米，经过45分钟，它的针尖转过的弧长是（ ）厘米。
（A）7．5∏ （B）15∏ （C）37．5∏ （D）75∏ 26、边长为3cm、4cm、5cm的三角形的外接圆半径等于（ ）cm.
（A）1．5 （B）2 （C）2．5 （D）2．4 27、下列命题是真命题的有（ ）个。 ①过弦的中点的直线必过圆心；②相等的圆心角所对的弧相等；③弦的垂线平分弦所对的弧；④若圆的一弦长等于圆半径，则其所对的圆周角是30°；⑤三点可以确定一个圆；⑥若点P
22
（a，b）在抛物线y=x上，则点A（1，3）能在抛物线y=ax+bx+c上 (A) 1个 （B）2个 （C）0个 （D）3个
29、已知电灯电路两端的电压U是220V，设电灯内钨丝的电阻