有一种爱,是至深至纯的,无微不至的,不求回报的。这种爱是( )
A:儿女的爱
B:朋友之间的爱
C:老师的爱
D:父母的爱
sun mountains birds river flowers what rainbow park clouds nice
This is a nature ____ .There is a ____ and some ____ in the sky.There are two ____ flying in the sky.Look! There is a beautiful ____ between the two ____ .There is a long ____ on the grass.There are some ____ on the grass. ____ a ____ picture it is!
因式分解:x3﹣9x=____ .