A:交配
B:筑巢
C:产卵
D:求偶
读图,图中箭头所指的方向符合我国哪一个自然地理要素变化规律()
— Would you like to do it at all?
— I'd love to, but the question is _____it is worth doing.
如图所示,从双曲线-=1(a>0,b>0)的左焦点F引圆x2+y2=a2的切线,切点为T,延长FT交双曲线右支于P点,若M为线段FP的中点,O为坐标原点,则|MO|-|MT|与b-a的大小关系为 ( )