—For about a week.
A:how long can a man live
B:how long a man can live
C:when can a man live
D:when a man can live
一Where are they from?
一Most of them from China. A small number of them from England.
如图,把△COD扩大后得到△AOB,若点C,D,B的坐标分别为C(1,2),D(2,0),B(5,0).则点A的坐标为( )
阿拉伯数字的发明者是古代的( )