下列用途中，利用物质物理性质的是（   ）

翻____怒____    前____后____

灭____之灾        大____世界

成千上____        来____不易

—____. It's Steven's.     

    Many teenagers have  ____. But sometimes these can get in the way of ____ schoolwork. Liu Yu is a ____ star on his school team. His dream is to be a  ____ runner when he ____ up. His parents won't allow him ____ so much although they have nothing ____ running. They think their son needs to think about other possible____. Liu Yu ____ with them. He thinks his parents are too strict with him. He also thinks it's very important ____ for himself. Only in this way can he have a chance to achieve his dream.

函数y=sin$y=\sin \left(\frac{\mathrm{\pi }}{4}-2x\right)$的单调增区间是（   ）