A:5︰2
B:8︰5
C:5︰8
D:2︰5
如图,正比例函数y=3x与反比例函数y=kxk≠0的图象在第一角限内交于点A,且AO=2,则k=____ .
Food aid______ is not enough to ______ the problem _______ now.
蝌蚪在发育过程中尾巴逐渐消失。该过程发生了