在等比数列{an}中,a2=﹣3,a4=﹣6,则a8的值为( )
A:-24
B:24
C:±24
D:-12
地球自转和公转一致的是( )
Hello ! My name is LiQiang . There are four people in my family . My father is a worker . My mother is a farmer . My little sister is a pupil. I am a pupil , too . We are in the same school .
下列有关海水综合利用的说法正确的是( )