平面α与平面β平行的条件可以是( )
A:α内有无穷多条直线与β平行
B:直线a∥α,a∥β
C:直线a⊂α,直线b⊂β,且a∥β,b∥α
D:α内的任何直线都与β平行
如图,△ABC的三个顶点都在方格纸的格点上,其中点A的坐标是(﹣1,0).现将△ABC绕点A顺时针旋转90°,则旋转后点C的坐标是 ____ .
录音中有一篇短文,是德州市第16中学校园广播电台播放的主题节目“Story Of The Week”,宗旨是宣传好人好事,培养学生的优秀道德品质.听广播两遍后,请你根据表格内容提示,记录相关信息,完成表格(每空一词).
Story Of The Week
Who
Zhang Ming in Class 6,Grade 9
When
on the afternoon of____26th
Where
around a corner on his way back home from school
What
found a ____lying on the ground
How
waited for one and a half ____but nobody came;
found a name card with a ____number;
called the man on the name card
The owner(主人)
wrote a ____to the school and thanked Zhang Ming
Comments(评价)
kind and honest