—My math teacher said I was too lazy.—______________. You should work harder.
A:Good idea
B:I'm sorry
C:Good luck
D:Have a great time
脊髓从胸段折断的病人,出现大小便失禁的原因是( )
今年春夏季的连续干旱,使我国江南地区田地龟裂,河塘干涸,农作物大量减产或绝收,渔业生产大受影响。请根据以上信息和所学生物学知识回答下列问题。