A:any
B:some
C:none
D:much
如图,直线AB、CD被直线EF所截,AB∥CD,∠1=100°,则∠2等于( )
一个等腰三角形的两边长分别为2和5,则它的周长为( )
I didn't do very well in this exam. Unluckily, he did it .