圆心在原点上与直线x+y﹣2=0相切的圆的方程为 ( ).
x2+y2=2
“ They went to the lecture, but it had been put off.” “ Oh, so they _______.”
A.needn’t have gone
B.should have gone
C.mustn’t have gone
D.don’t need to go
A.你别总在屋子里学习,应该出去走走。B.我常常和哥哥一起打。C.我记得那个饭店就在附近,怎么找不到了呢 D.我来了一个多月了,对这儿的生活还不太习惯。E.现在是6月份,6月的天气总是变得很快。
是啊,春天到了,我要和朋友一起去公园玩儿玩儿!