— Would you like to fly a ____ with me?
— Sorry, I can't. I have to do my ____.
如图所示,a、b、c表示有理数,则a、b、c的大小顺序是( )
观察鲫鱼时,我们看到鲫鱼的身体呈____ 形,这种体形在它游泳时可以起到减小____ 的作用.