(2010•丽江)已知∠a=72°,则∠a的余角是 .
考点分析:
相关试题推荐
(2010•丽江)如图,在半径为4的⊙O中,∠OAB=30°,则弦AB的长是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230549346305944/SYS201310212305493463059006_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230549346305944/SYS201310212305493463059006_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230549346305944/SYS201310212305493463059006_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230549346305944/SYS201310212305493463059006_ST/2.png)
D.8
查看答案
(2010•丽江)反比例函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230549346305944/SYS201310212305493463059005_ST/0.png)
和一次函数y=kx-k在同一直角坐标系中的图象大致是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230549346305944/SYS201310212305493463059005_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230549346305944/SYS201310212305493463059005_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230549346305944/SYS201310212305493463059005_ST/images3.png)
D.
查看答案
(2010•丽江)如图,在梯形ABCD中,AD∥BC,AC交BD于点O,要使它成为等腰梯形需要添加的条件是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230549346305944/SYS201310212305493463059004_ST/images0.png)
A.OA=OC
B.AC=BD
C.AC⊥BD
D.AD=BC
查看答案
(2010•丽江)众志成城,搞震救灾,某团小组7人为支援玉树地震灾区捐款,他们捐款的数额分别是(单位:元):
10、5、7、12、10、20、8,这组数据的众数和中位数分别是( )元.
A.8,10
B.10,8
C.10,9
D.10,10
查看答案