已知二次函数y=﹣x²+3x﹣ $\frac{3}{5}$ ，当自变量x取m对应的函数值大于0，设自变量分别取m﹣3，m+3时对应的函数值为y₁，y₂，则（　　）

用方框中所给单词的适当形式填空，使短文正确、通顺，每次限用一次：

    Everyone is talking about Bird Flu. Yes, it is a very ____ disease. It could make people sick. It will be a few months still before we have good____ for Bird Flu. In order to(为了) ____ Bird Flu, we shouldn’t touch sick chickens or their droppings(粪便). So it is a good idea for people to keep ____  from live chickens. But if you do touch an ill bird, remember to wash your hands carefully with soap(肥皂)____ away. Also, don't forget to open your windows often and ____ regularly(正常地). Getting ____ sleep is also very important for fighting ____ . Try to keep away from people who have the ____ , and always cover your mouth and nose when you  ____ or sneeze(打喷嚏).