relationship, established equivalent relationship 14, and subject: application problem (4)--scores and percentage application problem review content overview answers scores, and percentage application problem of key is: according to meaning, (1) determine standard volume (units \e \ corresponds to\p, Then in-line solution. Category fraction multiplication word problem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of capacity, measurement and units of measurement of common units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volume, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)--line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle angle of classification (slightly) 17, and subject: geometry preliminarknowledge (2)--plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combination graphics of area subject : Preliminary knowledge (3)-review of solid content category 1-d shapes are divided into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features of cuboids and cubes relationship between characteristics of circular cone is slightly solid surface area and volume 1, size 2, table ...和南沙区2012-2013学年第一学期期末学业水平测试

七年级 数学

本试卷分第一部分(选择题)和第二部分（非选择题），总分100分。考试时间90分钟。

注意事项：

1．答题前，考生务必在答题卡上用黑色字迹的钢笔或签字笔填写学校、姓名、试室号和座位号；填写自己的考号，再用2B铅笔把对应该两号码的标号涂黑。

2．选择题每小题选出答案后，用2B铅笔把答题卡上对应题目的答案标号涂黑；如需改动，用橡皮擦干净后，再选涂其他答案；不能答在试卷上。

3．非选择题答案必须写在答题卡各题目指定区域内的相应位置上；如需改动，先划掉原来的答案，然后再写上新的答案，改动的答案也不能超出指定的区域；除作图可用2B铅笔外，其他都必须用黑色字迹钢笔或签字笔作答。不准使用涂改液。不按以上要求作答的答案无效。

4．考生必须保持答题卡的整洁。

5．全卷共24小题，请考生检查题数。

一、选择题（本题有10个小题，每小题2分，满分20分，下面每小题给出的四个选项中，只有

一个是正确的）

221.在3，?3，0，?20的个数的是（ ） %，20%，?0.5，?，中，其中负分数．．．55 A. 3个； B. 4个； C. 5个 D. 6个

2. 青藏高原是世界上海拔最高的高原，它的面积约为2 500 000平方千米.将2 500 000用科学记数法表示应为（ ）

776Ａ．0 Ｂ．2 Ｃ．2 .25?10.5?10.5?10 Ｄ．25?105

3. 下列计算正确的是（ ）

11A．( B．? ?15)?(?1)??3?1??22??3??2?1??2532C．? (?3)??92 D．? (?4)?164. 下列判断中正确的是（ ）

x1A．若?7，则x?1 B．若1?x?2，则x?6

76C．若3，则3x?6 D．若ax，则a?b x?6?0?bx5.下列变形中，不正确的是（ ）．．．

A.a B.a ?(b?c?d)?a?b?c?d?(b?c?d)?a?b?c?dC.a D.a ?b?(c?d)?a?b?c?d?b?(?c?d)?a?b?c?drelationship, established equivalent relationship 14, and subject: application problem (4)--scores and percentage application problem review content overview answers scores, and percentage application problem of key is: according to meaning, (1) determine standard volume (units \e \ corresponds to\p, Then in-line solution. Category fraction multiplication word problem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of capacity, measurement and units of measurement of common units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volume, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)--line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle angle of classification (slightly) 17, and subject: geometry preliminarknowledge (2)--plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combination graphics of area subject : Preliminary knowledge (3)-review of solid content category 1-d shapes are divided into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features of cuboids and cubes relationship between characteristics of circular cone is slightly solid surface area and volume 1, size 2, table ...和6. 方程?的解为（ ） 2x?4?5?3x11Ａ．?1 Ｂ．1 Ｃ．? Ｄ．

557.如图是一个正方形盒的展开图，若在其中的三个正方形A、B、C 内分别填入适当的数，使得它们折成正方形后相对的面上的两个数互为相反数，则填入正方形A、B、C内的

三个数依次为（ ） A. 1，?2，0 B. 0，?2，1 C. ?2，0，1 D ?2，1，0

8. 下列说法正确的是（ ）

4A. 近似数52.16精确到十分位； B. 近似数9精确到十分位 .6?103C. 0.10200有3位有效数字； D. 2有2位有效数字 .5?109. 若a?3，b?4，且ab?0,则a?b的值是（ ） A.1 B. ?7 C. 7或?7 D. 1或?1

10. 在时刻8：30,时钟的时针和分针之间的夹角是（ ） A．85° B．75° C．70° D．60°

二、填空题（本题有6个小题，每小题2分，共12分） 11.如果向北走20m记作?20m，那么向南走30m表示_________； 12. 写出?x2y的一个同类项_____________；

??，??的余角??=_________，??的补角??=________； 13. 如果???452214.已知关于x的方程2的解是x?2，则a的值为________； x?a?9?015. 南沙区年内计划举办千人绘画颂南沙活动，在会场上摆放了一些长桌用于作画，每张桌子单独摆放时，可以容6人同时签名，（如图1，每个小圆弧代表一个签名的位置），按图2的方式摆放两张长桌可以容纳10人同时签名，若按这种方式摆放n张桌子（如图3），这n张桌子可以同时容纳的签名人数是_________________.

???图1图2图3

16.有理数a、b、c在数轴上的位置如图所示，化简a?b?a?c?b?c的结果

是________________．

三、解答题（本题共8个小题，共68分，解答要求写出文字说明，证明过程或计算步骤） 17.计算（本题12分，每小题4分）

relationship, established equivalent relationship 14, and subject: application problem (4)--scores and percentage application problem review content overview answers scores, and percentage application problem of key is: according to meaning, (1) determine standard volume (units \e \ corresponds to\p, Then in-line solution. Category fraction multiplication word problem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of capacity, measurement and units of measurement of common units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volum, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)--line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle angle of classification (slightly) 17, and subject: geometry preliminarknowledge (2)--plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combination graphics of area subject : Preliminary knowledge (3)-review of solid content category 1-d shapes are divided into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features of cuboids and cubes relationship between characteristics of circular cone is slightly solid surface area and volume 1, size 2, table ...和1222 （1）? （2）? （3）( (?2)?(?3)2?3?(?4)?2)?2???(?10)4

18. 解一元一次方程（8分）

x?22?x ?2?1?42

19. （6分）第一行的图形绕虚线转一周，能形成第二行的某个几何体，按要求填空.

图1旋转形成_______， 图2旋转形成_______,图3旋转形成_______, 图4旋转形成_______, 图5旋转形成_______,图6旋转形成_______.

20.（8分）如图，已知C点为线段AB的中点，D点为BC的中点，AB，求AD的长度。 ?8cm