A:I think So.
B:I don't think so
C:Yes, I like it.
D:It's a good film
某地位于140°W,与它组成经线圈的经线是( )
代数式-13xa+bya-1与3x2y是同类项,则b-a的值为( )
-- Let make it 8:00 o'clock the morning of April 20th.