题目

A Leap (跳跃) to Honor Leaping on a narrow balance beam (平衡木) is not easy. But Lola Walter, a 13-year-old gymnast, is an expert at it. To perfect her skills, Lola ___41___ for four hours a day, five days a week. At the state championships in March, she finished seventh out of 16 girls. That’s especially impressive, ___42___ she is legally blind, born with a rare condition that causes her eyes to shift constantly. She often sees double and can’t ___43___ how far away things are. When she was little, her mom ___44___ that even though she couldn’t see ___45___, she was fear关于x的方程x2-（2m2+m-6）x-m=0两根互为相反数，则m=________．