A:causing
B:being caused
C:to be caused
D:to cause
治理污染、保护环境,事关人民群众的身体健康和社会的可持续发展.
There is something wrong with my car , I want to have it ____
若函数f(x)=x2-ax-b的两个零点是2和3,则函数g(x)=bx2-ax-1的零点是( )