【简答题】已知抛物线的顶点在原点,它的准线过双曲线 的一个焦点,并与双曲线的实轴垂直,已知抛物线与双曲线的交点为 . (1)求抛物线的方程; (2)求双曲线的方程.
【单选题】RIS执行程序的速度比IS要快的原因是()。
【简答题】抛物线的顶点在原点,它的准线过双曲线 的一个焦点,且与双曲线实轴垂直,已知抛物线与双曲线的交点为 (1)求抛物线的焦点坐标; (2)求双曲线的方程.
【简答题】分支移动(branch migration)
【简答题】生殖洄游(breeding migration)
【简答题】重要思想的本质是:____;地位是:____。
【单选题】Human Migration Human migration: the term is vague. What people usually think of is the permanent movement of people from one home to another. More broadly, though, migration means all the ways — from...
A.
Human migration is a vague term which can not be explained simply, but it is seasonal or permanent movement of agricultural workers.
B.
Human migration is the permanent movement of people within a country to another location from one home to another.
C.
Human migration means agricultural workers' seasonal moving within a country or refugees' resettlement from one country to another.
D.
Human migration is big, dangerous, and compelling, and it is the great adventure of human life that has driven humans to conquer the planet, shape the societies.