A:every day; every day
B:every day; everyday
C:everyday; everyday
D:everyday; every day
Dad arrived in Shanghai by air yesterday.
已知两点A(1,2),B(3,1)到直线l的距离分别为2,5-2,则满足条件的直线l共有( )条
如图,将长方形ABCD分割成1个灰色长方形与148个面积相等的小正方形.若灰色长方形的长与宽之比为5:3,则AD:AB=____