从北极上空看,地球自转的方向是( )
A:顺时针
B:逆时针
C:自东向西
D:自北向南
找规律,在空格里填上适当的数.
“独学而无友,则孤陋而寡闻。”这句话告诉我们( )
—I since I was 11. Now I am thinking about picking it up again.
—Good for you!