尼罗河发源于[ ]
A．东非高原
B．中非高原
C．埃塞俄比亚高原
D．南非高原
答案：C
Rio De Janeiro, ___________the right to host the 2016 Olympic Games, will be occupied in building stadiums.
A．winning
B．won
C．having won
D．to win
点A（-2，3）到x轴的距离为______，到y轴的距离是______．
