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1、七年级下数学期中试卷结构分析七年级下期末试卷总的结构分为三大类:选择题、填空题、解答题。 选择题大概有810题，涉及的知识范围有:代数式的系数与次数;单项式的判断;图形平移;平行线的性质与条件(四个条件是什么,哪三个性质,);三角形的三边关系(两边之和大于第三边，两。边之差小于第三边);多边形的内角和公式(180*(n-2);多边。形的外角和(360);多边形的对角线条数;三角形的高、中线、角平分线(高、中线、角平分线的画法);角度数的求解;三角形的稳定性;简单幂的运算(同底数幂的乘法法则);单项式乘单项式;求图形的面积;二元一次方程的定义(判断给定代数式是否为二元一次方程);解方程组的方法(
2、极简单的解二元一次方程组);简单二元一次方程组的应用等。 填空题大概有810题，涉及的知识点范围有:单项式;二元一次方程的定义;幂的运算(四个法则的综合运用);三角形的外角和;多边形的内角和;多边形的对角线条数;解二元一次方程组(比较简单的);二元一次方程组的应用;求图形的面积;求角的度数;平行直线的性质与条件;小的探究性题目等。 解答题大概有五大题，涉及的知识点范围:化简代数式(幂运算的四个法则综合运用);解二元一次方程组(两种解法:代入消元法、加减消元法);三角形内角和与外角和的综合运用;求角的度数(平行直线的性质与条件、角平分线、外角性质、对顶角等的综合运用);should be tig
3、htened, no loose, Terminal Board wiring should be one on each side, no more than two. J, shielded wire, spare wire binding order, reliable grounding. 7.7 quality standard 7.7.l cables through the cable embedded tube making use of galvanized steel pipe, tube ends without burrs, smooth. 7.7.2 pipe doe
4、s not allow bending, bending the bend radius should be ? 4 times times the outer diameter of the tube in. 7.7.3 ellipticity of a bent tube, pipe diameter ? 60mm, not 8%, diameter 760mm, not 6%. 7.7.4 making cables buried piping application root production, growing where interface is required, only s
5、traight pipe, only the wire port connections, welded connections are not allowed. 7.7.5 service sleeve should have a good grounding. 7.7.6 cable trays installation, burrs and dirt and corrosion treatment should be carried out, install the bridge . 7.8.1.7 piping and piping, equipment and equipment o
6、r piping and other equipment shall have sufficient expansion gap in hot situations. 7.8.1.8 metal temperature of the insulating layer (hot) = shell-wall temperature of environment temperature ? 40 ? c. 7.8.2 paint 7.8.2.l paint of equipment and pipelines should have at least a primer (red paint) and
7、 finish. 7.8.2.2 paint appearance color uniform, without paint, rust, flaking, wrinkles, flow marks, scum, paint particles and visible brush marks. 7.8.2.3 interlayer should be tight and without stratification. 7.8.2.4 pipelines asphalt, fiber glass fabric corrosion, external appearance should never
8、 show surrounded by glass fiber cloth uniform, dense, painted pitch inspection should be no delamination, cavitation, homogeneity of asphalt coating, brushing each layer thickness in accordance with design requirements. Standard 7.9 7.9 structure placement process. 1 fair-faced concrete is a concret
9、e surface without any decoration, structure appearance quality of concrete structure that is able to display strength and aesthetic perception of quality standards. Construction technology requirements are as follows: template template Panel selection and processing require plate high strength, good
10、 toughness and 证明题(角相等、求证直线平行等)、二元一次方程组的应用、探究性题目等。 附加题大概是两道，涉及的知识点主要是两方面:一方面，二元一次方程组的应用;另一方面，与平面图形的认识相结合的探究性题目。 一、 选择题(810题) 16题:单项式(系数与次数);平行直线的的性质与条件(同位角、内错角、同旁内角);图形平移;三角形的三边关系(两边之和大于第三边，两边之差小于第三边);二元一次方程定义;幂的运算(同底数幂的乘法法则);三角形的高、中线、角平分线;角度的计算;三角形的内角和;多边形的内角和;多边形的外角和;多边形的外角性质;单项式与单项式相乘、单项式与多项式相乘、多
11、项式与多项式相乘;科学计数法等。 1、例题: 12abc、,7x，1、y，1,、0,、,5m(1)代数式: ,中单项式共有( )个. 2A(1个 B(2个 C(3个 D(4个 12,ab(2)单项式的系数和次数分别为( ) 21111A. - ，2 B.- ，3 C.，2 D. ，3 2222ab2adx,y(3)在代数式:， ,2， 0，,中，单项式共有( )个 33A 3 B 4 C 5 D 6 分析:单项式(系数与次数)。 2、例题: (1)下列命题是真命题的是( ) should be tightened, no loose, Terminal Board wiring should
12、be one on each side, no more than two. J, shielded wire, spare wire binding order, reliable grounding. 7.7 quality standard 7.7.l cables through the cable embedded tube making use of galvanized steel pipe, tube ends without burrs, smooth. 7.7.2 pipe does not allow bending, bending the bend radius sh
13、ould be ? 4 times times the outer diameter of the tube in. 7.7.3 ellipticity of a bent tube, pipe diameter ? 60mm, not 8%, diameter 760mm, not 6%. 7.7.4 making cables buried piping application root production, growing where interface is required, only straight pipe, only the wire port connections, w
14、elded connections are not allowed. 7.7.5 service sleeve should have a good grounding. 7.7.6 cable trays installation, burrs and dirt and corrosion treatment should be carried out, install the bridge . 7.8.1.7 piping and piping, equipment and equipment or piping and other equipment shall have suffici
15、ent expansion gap in hot situations. 7.8.1.8 metal temperature of the insulating layer (hot) = shell-wall temperature of environment temperature ? 40 ? c. 7.8.2 paint 7.8.2.l paint of equipment and pipelines should have at least a primer (red paint) and finish. 7.8.2.2 paint appearance color uniform
16、, without paint, rust, flaking, wrinkles, flow marks, scum, paint particles and visible brush marks. 7.8.2.3 interlayer should be tight and without stratification. 7.8.2.4 pipelines asphalt, fiber glass fabric corrosion, external appearance should never show surrounded by glass fiber cloth uniform, dense, painted pitch inspection should be no delamination, cavitation, homogeneity of asphalt coating, brushing each layer thickness
