满分5 >
初中数学试题 >
根据相关部门调查统计,近几年来我国内地公路每年平均罚款达到了4000亿元,将40...
根据相关部门调查统计,近几年来我国内地公路每年平均罚款达到了4000亿元,将4000亿元用科学记数法表示为 亿元.
考点分析:
相关试题推荐
在正方形ABCD中,将∠ADC绕点D顺时针旋转一定角度,使角的一边与BC的交点为点F,且CF=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200547056/SYS201310221616002005470009_ST/0.png)
BF,另一边与BA的延长线交于点E,连接EF,与BD交于点M.∠BEF的角平分线交BD于点G,过点G作GH⊥AB于H.在下列结论中:(1)
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200547056/SYS201310221616002005470009_ST/1.png)
;(2)DG=DF;(3)∠BME=90°;(4)HG+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200547056/SYS201310221616002005470009_ST/2.png)
EF=AD.正确的个数有( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200547056/SYS201310221616002005470009_ST/images3.png)
A.4
B.3
C.2
D.1
查看答案
按下列方式摆放圆形和三角形,观察图形,第10个图形中圆形的个数有( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200547056/SYS201310221616002005470008_ST/images0.png)
A.36
B.38
C.40
D.42
查看答案
已知二次函数y=ax
2+bx+c(a≠0)的图象如图所示,有下列结论:(1)b
2-4ac>0;(2)abc>0;(3)8a+c>0;(4)6a+3b+c>0,其中正确的结论的个数是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200547056/SYS201310221616002005470007_ST/images0.png)
A.4
B.3
C.2
D.1
查看答案
星期天,小明和小兵租用一艘皮划艇去嘉陵江游玩,他们先从上游顺流划行1小时,再停留0.5小时采集植物标本,然后加速划行0.5小时到下游,最后乘坐公交车1小时回到出发地,那么小明和小兵距离出发点的距离y随时间x变化的大致图象是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200547056/SYS201310221616002005470006_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200547056/SYS201310221616002005470006_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200547056/SYS201310221616002005470006_ST/images2.png)
D.
查看答案
如图,A、B、C、D分别是⊙O上的四点,∠AOC=80°,则∠ADC和∠ABC等于( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200547056/SYS201310221616002005470005_ST/images0.png)
A.40°和140°
B.40°和110°
C.50°和140°
D.50°和110°
查看答案