We need ____ (many) hospitals and schools in the new community.
女性的卵巢和输卵管通常被称作子宫的附件.下列说法正确的是( )
二次函数y=ax2+bx+c(a≠0,a、b、c为常数)的图象如图,则方程ax2+bx+c=m有实数根的条件是____.