You had better learn to _________ different kinds of problems by yourself.
A:give up
B:make up
C:play with
D:deal with
Danny, what do you usually do ________ school nights?
Mum, why did you____(相混合)sugar and salt?
中生代恐龙灭绝的事实表明( )
正方形A1B1C1O,A2B2C2C1,A3B3C3C2,…按如图所示的方式放置.点A1,A2,A3,…和点C1,C2,C3,…分别在直线y=kx+b(k>0)和x轴上,已知点B1(1,1),B2(3,2),则Bn的坐标是( )