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学校 姓名 班级___________ 座位号 ……装…………订…………线…………内…………不…………要…………答…………题……
一、选择题：（每小题3分， 共30分）This article includes some parts, including text, pictures, and design. Copyright is personal ownership
（ ）1．-2的绝对值是
A．－2
B．2
C．12
D．－12
（ ）2．如图1，已知线段AB，以下作图不可能的是
A. 在AB上取一点C，使AC=BC
B. 在AB的延长线上取一点C，使BC=AB C. 在BA的延长线上取一点C，使BC=AB A O
B D. 在BA的延长线上取一点C，使BC=2AB
（ ）3. 下列计算正确的是 图1
A. - (
32)3=?627 B.-(23)2 =49 C. - (23)3=8332727 D. - (5)= - 125
（ ）4.下列方程中,属于一元一次方程的是
A.
12222
x?2?0 B. 3x+4y=2 C. x+3x=x-1 D.x+3x-1=8+5x （ ）5．下列事件中，必然发生的事件是
（A）明天会下雨 （B）小明数学考试得99分
（C）今天是星期一，明天就是星期二 （D）明年有370天
（ ）6．如图，∠AOB=180°，OD、OE分别是∠AOC和∠BOC的平分线，则与
线段OD垂直的射线是
A.OA B.OC C.OE D.OB
（ ）7. 用一个平面去截一个正方体，截面的形状不
可能是
D A、梯形 B、五边形 This article includes some parts, including text, pictures, and design. Copyright is personal ownership
C C、六边形 D、七边形
（ ）8．如果2(x+3)的值与3(1-x)的值互为相反数,
E
那么x等于
A A.9 B.8 C.-9 D.-8 This article includes some parts, including text, pictures, and design. Copyright is personal ownership
O B
9．．某工厂现有工人x人，若现有人数比两年前原有人数减少35％，则该工厂原有人数为
A
x1?35% B x1?35% C （1＋35%）x D （1＋35%）x
10．如果代数式4y2
－2y＋5的值是7，那么代数式2y2
－y+1的值等于 A． 2 B． 3 C．﹣2 D．4 二、耐心填一填：（本大题8小题，每小题3分，计24分）This article includes some parts, including text, pictures, and design. Copyright is personal ownership 11、若点C是线段AB的中点，且AB=10cm,则AC = cm．
12、姚明一定不会输给其他任何一个NBA球员：是 事件（填必然，不可能或不确定）。This article includes some parts, including text, pictures, and design. Copyright is personal ownership 13.据测算，我国每年因沙漠化造成的直接经济损失超过5400000万元，用科学记数法表示这个数是 万元。This article includes some parts, including text, pictures, and design. Copyright is personal ownership
14、 甲、乙、丙三地的海拔高度分别是20 m、-15m、-5m，那么最高的地方比最
低的地方高__________mThis article includes some parts, including text, pictures, and design. Copyright is personal ownership 15、如果某月共有4个星期五，这4个星期五的日期之和
为62，则这4天分别是
D 16、小刚每晚19:30都要看央视的“新闻联播”节目,这A C 时钟面上时针与分针夹角的度数为____________
17、如图，∠AOC和∠BOD都是直角，如果∠DOC=36?，
B 则∠AOB是__ ______度；
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B 18、如图，下面是用火柴棍摆的正方形，请你仔细观察第
第17题 n个图形中共有 根（用n的代数式表示）火柴棍。 n=1
n=2 n=3 n=4
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三、细心做一做（本大题4小题，每小题8分，共32分） 19、 计算：－42
×
113(?4)2＋│－2│3
×（－2） This article includes some parts, including text, pictures, and design. Copyright is personal ownership
20、 解方程：x?x?25?2x?53?3
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21、先化简，后求值：已知：?2(mn?3m2)?[m2?5(mn?m2)?2mn]，其中
m?1,n??2
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…
22、 如图,AB∥CD,直线EF分别交AB、CD于点E、F, EG平分∠AEF,∠1＝40°．求∠2的度数.
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四、沉着冷静，周密考虑(本大题共2小题，每小题11分，共22分) 23、已知1-
12=12, 12-13=16, 13-14=112,14-115=20…根据这些等式求值. 11?2?1112?3?3?4??2008?2009
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24、出租车的收费标准为起步价5元,3千米后每千米收费1.70元,某人乘坐出租车x千米,付费多少元?若他坐出租车7千米,要付费多少元?
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五、充满信心，成功在望(共12分)
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25、请根据图中提供的信息,回答下列问题 :
（1）一个暖瓶与一个水杯分别是多少元?This article includes some parts, including text, pictures, and design. Copyright is personal ownership
（2）甲、乙两家商场同时出售同样的暖瓶和水杯,为了迎接新年,两家商场都在
搞促销活动,甲商场规定： 这两种商品都打九折;乙商场规定：买一个暖瓶赠送一个水杯。若某单位想要买4个暖瓶和15个水杯，请问选择哪家商场购买更合算，并说明理由.
38元 84元
参考答案
一、
题号 1 2 3 4 5 6 7 8 9 10 答案 B C D C C C D A B A
二、11、5 12、不确定 13、5.4×106
, 14、35 15、5 号、12 号、19 号、 26 号
16、150
° 17、144 18、3n+1 19、?16?116?8?(?18)=-1-1=-2 20、去分母，得 15x-3(x-2)=5(2x-5)-3×15 去括号,得
15x-3x+6=10x-25-45
移项，得15x-3x-10x =-25-45-6 合并同类项，得 2x=-76 系数化为1，得x=-38This article includes some parts, including text, pictures, and design. Copyright is personal ownership
21、解：?2(mn?3m2)?[m2?5(mn?m2)?2mn]=
?2mn?6m2?m2?5mn?5m2?2mnThis article includes some parts, including text, pictures, and design. Copyright is personal ownership
=?4mnThis article includes some parts, including text, pictures, and design. Copyright is personal ownership
将m?1,n??2代入得This article includes some parts, including text, pictures, and design. Copyright is personal ownership
原式=-4×1×（-2）=8This article includes some parts, including text, pictures, and design. Copyright is personal ownership
22、80° 23、
20082009 24、1.7x-0.1，11.8元； 25、(1)解：设一个暖瓶x元,则一个水杯为(38－x)元, 根据题意得：
2x＋3（38－x）=84This article includes some parts, including text, pictures, and design. Copyright is personal ownership 解得 x=30 38－30=8 This article includes some parts, including text, pictures, and design. Copyright is personal ownership 答：一个暖瓶30元,一个水杯8元This article includes some parts, including text, pictures, and design. Copyright is personal ownership
(2)若到甲商场购买,则所需的钱数为：（4×30＋15×8）×90%=216（元） 若到乙商场购买,则所需的钱数为：4×30＋（15－4）×8=208（元） 因为 208<216This article includes some parts, including text, pictures, and design. Copyright is personal ownership 所以,到乙家商场购买更合算
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