我国的林地主要分布在( )
A:东北、东南、西南地区
B:华北、西北、西南地区
C:东北、东南、西北地区
D:东北、西北、西南地区
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 ____.
设等比数列{an}的前n项和为Sn,若8a2+a5=0,则下列式子中数值不能确定的是 ( )