As we all know, Heze is ___ its peony(牡丹). It attracts millions of visitors from home and abroad every year.( )
A.popular withB.well﹣known as
C.famous for
命题“”的否定是( )
抛物线的准线方程是( )
“” 是“”成立的( )
椭圆的焦点坐标是( )
命题“2和3都是素数”的形式是( )