已知函数f（x）=ax2+2ax+4（0＜a＜3），若x1＜x2，x1+x2=1

     Your room is your own special space. It's __1__ just a place for you to study and sleep. So make
it fun and __2__ to live in. Here are some tips to help you.
     Give your room a theme. Having a __3__ makes your room look more stylish and beautiful. A 
room's theme can be __4__. It could be about one of your favorite things, like football or music or
a colour. Pick a theme and keep it in mind, then decorate the room around the theme you have chosen.
__5__, some boys like skateboarding. Paint the walls in skater stripes, and __6__ disco balls from
the ceiling and use skateboards as shelves. __7__ you are a girl, you may be more interested in __8__
like dolphins. Pick curtains and bed covers with dolphin patterns on them. Put dolphin toys on your
bed, too. Draw or paint pictures of dolphins playing on your walls. Make your room as blue as the
__9__. So when you walk into the room, you __10__ it's a home for dolphins!