叶绿体中色素的分离过程中，在滤纸条上扩散速度最慢的色素及其主要吸收的光是（　　）

函数y=（m﹣n）x²+mx+n是二次函数的条件是（　　）

    Sally is a good girl. She never ____  up late. Her mother wakes her up（唤醒）at 6:00 a.m. From a quarter ____  six, she begins to do sports. The she comes back and has ____  at six forty. After that, she goes to school. Sometimes she ____ her bike.
At school, Sally has seven classes on ____ . Sally is good at（擅长）English. She san speak English very well. After school she often plays ____  games with her ____ . Then she goes home by bus. She gets home before 6:00 p.m.. After
____  she begins to do her ____ . Then she ____  TV for a while, she always goes to bed before half past ten.