人教版八年级数学下册同步练习《19.1 函数》

适用年级:初二
试卷号:597873

试卷类型:课时练习
试卷考试时间:2018/3/19

1.单选题(共5题)

1.
如图,△ABC在平面直角坐标系中的第二象限内,顶点A的坐标是(-2,3),先把△ABC向右平移4个单位长度得到△A1B1C1,再作△A1B1C1关于x轴的对称图形△A2B2C2,则顶点A2的坐标是
A.(-3,2)B.(2,-3)C.(1,-2)D.(3,-l)
2.
点P(﹣2,1)在平面直角坐标系中所在的象限是()
A.第一象限B.第二象限C.第三象限D.第四象限
3.
在平面直角坐标系中,点P(-2,+1)所在的象限是
A.第一象限B.第二象限C.第三象限D.第四象限
4.
已知x轴上的点P到y轴的距离为3,则点P的坐标为(    )
A.(3,0)B.(0,3)
C.(0,3)或(0,-3)D.(3,0)或(-3,0)
5.
甲乙两位同学用围棋子做游戏.如图所示,现轮到黑棋下子,黑棋下一子后白棋再下一子,使黑棋的5个棋子组成轴对称图形,白棋的5个棋子也成轴对称图形.则下列下子方法不正确的是().[说明:棋子的位置用数对表示,如A点在(6,3)]
A.黑(3,7);白(5,3)B.黑(4,7);白(6,2)
C.黑(2,7);白(5,3)D.黑(3,7);白(2,6)

2.选择题(共3题)

6.

根据短文内容,用方框中所给词的正确形式填空,使短文完整、正确。

for   you   be   good   careful   do   should   ever   friend   true

      Middle school is going to use a new way to decide who the {#blank#}1{#/blank#} students are in your class. The top students won't only have high marks. They will also be kids who don't dye (染) their hair, smoke or drink. Here {#blank#}2{#/blank#} some of the new rules.

      Tell the {#blank#}3{#/blank#}. Have you ever copied someone else's work on an exam? Don't do it again! If you have played computer games for two hours in your room, don't tell your parents you have{#blank#}4{#/blank#}homework.

      Do more at school. Good students love animals and care for other people. You should learn more about animals and try to protect them. Be {#blank#}5{#/blank#} to other people. Try to think of others, not only yourself.

      Be open to new ideas. Have you {#blank#}6{#/blank#} thought that people could live on the moon? You {#blank#}7{#/blank#} welcome new ideas, because they make life better for everyone.

      Protect {#blank#}8{#/blank#}. If you have to go home late, you should let your parents know. Use the Internet {#blank#}9{#/blank#}. The Internet can be very useful for your studies. But some things on the Internet aren't good {#blank#}10{#/blank#} kids, so try to look at Websites that are good for you.

7.1861年巴斯德发现,利用酵母菌酿酒时,如果发酵容器中存在氧气,会导致酒精产生停止,这就是所谓的“巴斯德效应”,下面可能决定“巴斯德效应”发生与否的反应及其场所是(  )
8.1861年巴斯德发现,利用酵母菌酿酒时,如果发酵容器中存在氧气,会导致酒精产生停止,这就是所谓的“巴斯德效应”,下面可能决定“巴斯德效应”发生与否的反应及其场所是(  )

3.填空题(共1题)

9.
在平面直角坐标系中,规定把一个三角形先沿着x轴翻折,再向右平移2个单位称为1次变换.如图,已知等边三角形ABC的顶点BC的坐标分别是(﹣1,﹣1)、(﹣3,﹣1),把△ABC经过连续9次这样的变换得到△ABC′,则点A的对应点A′的坐标是______.

4.解答题(共2题)

10.
在平面直角坐标系中,点A关于y轴的对称点为点B,点A关于原点O的对称点为点C
(1)若A点的坐标为(1,2),请你在给出的坐标系中画出△ABC.设ABy轴的交点为D,则=
(2)若点A的坐标为(ab)(ab≠0),则△ABC的形状为
11.
[阅读]
在平面直角坐标系中,以任意两点P(x1,y1),Q(x2,y2)为端点的线段的中点坐标为
[运用]
(1)如图,矩形ONEF的对角线相交于点M,ON,OF分别在x轴和y轴上,O为坐标原点,点E的坐标为(4,3),则点M的坐标为________;
(2)在平面直角坐标系中,有A(-1,2),B(3,1),C(1,4)三点,另有一点D与点A,B,C构成平行四边形的顶点,求点D的坐标.
试卷分析
  • 【1】题量占比

    单选题:(5道)

    选择题:(3道)

    填空题:(1道)

    解答题:(2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:0

    5星难题:0

    6星难题:3

    7星难题:0

    8星难题:2

    9星难题:3