石窟、绘画是中国古代艺术的瑰宝。请根据提示写出相关内容。
Time of the accident
Last week.
Place of the accident
On my way to Li Ming's ____.
Reason and result of the accident
I rode too ____. My bike hit a big tree. I was in a lot of ____.
Aid
A passerby ____ me to the ____.
如图,AB是⊙O的直径,AB垂直于弦CD,∠BOC=70°,则∠ABD=( )
下列各组离子在溶液中一定能大量共存的是( )
下列各组物质中,能相互反应且反应前后溶液总质量增加的是( )