2017届辽宁省大石桥市水源镇九年一贯制学校九年级3月月考数学试卷(带解析)

适用年级:初三
试卷号:570227

试卷类型:月考
试卷考试时间:2017/4/14

1.单选题(共3题)

1.
下列方程①3x2-x=0;②+x2=1;③3x+=0:④2x2-l=(x -l)( x -2);⑤(5x -2)(3x -7)=15x2,其中是一元二次方程的有( )
A.1个B.2个C.3个D.4个
2.
某省为了实现到2017年全省森林覆盖率达到63%的目标,已知2015年全省森林覆盖率为60.05%,设从2015年起该省森林覆盖率的年平均增长率为x,则可列方程为 ( )
A.60.05(1+2x)=63%B.60.05(1+2x)=63
C.60.05(1+x)2=63%D.60.05(l+x)2=63
3.
由六个大小相同的正方体组成的几何体如图所示,它的俯视图是(  )
A.B.C.D.

2.选择题(共1题)

4.阅读理解

    It was dangerously cold. A few drivers slipping and sliding off the road and back on again had cut deep ruts(车辙)in the mud. And the ruts became frozen solid. The drum of our truck's aging engine worried us.

    Trees and bushes heavy with snow bent to form an icy tunnel. We inched along the scary route as Howard grasped the steering wheel(方向盘)tightly, trying to keep the truck in the ruts. We were now riding through a nightmare with no going back. I kept praying the truck would not quit.

    However, the engine's coughing grew worse. We came to a bumping stop. Hot tears ran down my face. We noticed a small house off in the distance. “I will go for help.” Howard's words ruined my common sense and panic took over. We would take the children — we would walk to that house together!

    But the snow was deep, and our two children, asleep in the cab, were too heavy to carry. My husband convinced me to let him go alone. If no one was home or they didn't answer the door, he would come back and we'd try to hike out to a main road. For now, it was safer in the truck. I wish I could say I have faith, but when he walked away, I was mad at the world.

    It seemed as if hours had passed before I heard a familiar voice and a kind laugh of another man as they approached in the snow. The older fellow invited us to go up to the house where his wife was waiting. Two wide-awake kids moved across the seat, ready for adventure. Their voices and laughter carried in the cold night air. When we finally got close, a cheerful woman opened the door. Warm air and the smell of hot buttered popcorn and chocolate drew us in.

     Relieved, my prayers were heard!

3.填空题(共4题)

5.
下列图形都是按照一定规律组成,第一个图形中共有2个三角形,第二个图形中共有8个三角形,第三个图形中共有14个三角形,…,依此规律,第五个图形中三角形的个数是__________ 。
6.
在函数y=中,自变量x的取值范围是________.
7.
如图,反比例函数y=(x>0)的图象交Rt△OAB的斜边OA于点D,交直角边AB于点C,点B在x轴上.若△OAC的面积为5,AD∶OD=1∶2,则k的值为______.
8.
已知地球上七大洲的总面积约为150000000km2,则数字150000000用科学记数法可以表示为____________ 。
试卷分析
  • 【1】题量占比

    单选题:(3道)

    选择题:(1道)

    填空题:(4道)

  • 【2】:难度分析

    1星难题:0

    2星难题:0

    3星难题:0

    4星难题:1

    5星难题:0

    6星难题:1

    7星难题:0

    8星难题:3

    9星难题:2