满分5 >
初中数学试题 >
如图,把一个长方形纸片沿EF折叠后,点D、C分别落在D′、C′的位置,若∠EFB...
如图,把一个长方形纸片沿EF折叠后,点D、C分别落在D′、C′的位置,若∠EFB=65°,则∠AED′等于( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192730947458606/SYS201311011927309474586006_ST/images0.png)
A.50°
B.55°
C.60°
D.65°
考点分析:
相关试题推荐
如果关于x的一元二次方程k
2x
2-(2k+1)x+1=0有两个不相等的实数根,那么k的取值范围是( )
A.k>
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192730947458606/SYS201311011927309474586005_ST/0.png)
B.k>
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192730947458606/SYS201311011927309474586005_ST/1.png)
且k≠0
C.k<
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192730947458606/SYS201311011927309474586005_ST/2.png)
D.k≥
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192730947458606/SYS201311011927309474586005_ST/3.png)
且k≠0
查看答案
不等式
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192730947458606/SYS201311011927309474586004_ST/0.png)
的解集是( )
A.x≥3
B.x≥2
C.2≤x≤3
D.空集
查看答案
下列说法正确的是( )
A.抛一枚硬币,正面一定朝上
B.掷一颗骰子,点数一定不大于6
C.为了解一种灯泡的使用寿命,宜采用普查的方法
D.“明天的降水概率为80%”,表示明天会有80%的地方下雨
查看答案
如图,桌面上放着1个长方体和1个圆柱体,按如图所示的方式摆放在一起,其左视图是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192730947458606/SYS201311011927309474586002_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192730947458606/SYS201311011927309474586002_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192730947458606/SYS201311011927309474586002_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192730947458606/SYS201311011927309474586002_ST/images3.png)
D.
查看答案
函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192730947458606/SYS201311011927309474586001_ST/0.png)
中,自变量x的取值范围是( )
A.x>5
B.x<5
C.x≥5
D.x≤5
查看答案