由分式的值为零的条件得1+x2≠0且|2x-5|=0，
解得x=52．
故答案为：52．
产生渗透现象和渗透压必备的条件是（）
A.溶液
B.半透膜
C.两者均有
D.两者均无
Dozens of scientific groups all over the world have been ______ the goal of a practical and economic way to use sunlight to split water molecules.
A．pursuing
B．chasing
C．reaching
D．winning
