如图，抛物线y=﹣x²+mx+n与x轴交于A，B两点，y与轴交于点C，抛物线的对称轴交x轴于点D．已知A（﹣1，0），C（0，3）

因不少大学生不愿意选择艰苦的、待遇不高的岗位，“择业难”加剧了“就业难”。针对这种状况，这些大学生应该树立（   ）。

    Five months ago. I ____(happen) to be upstairs at dusk when the window was open. I didn't go downstairs until the window had to ____(shut). The dark, rainy evening, the wind and the thundering clouds held me ____(entire) in their power.

    It was the first time in one and a half ____(year) since we found shelter here that I'd seen the night face to face. Sadly I am only able to look at nature through dirty curtains ____(hang) before very dusty windows.____is no pleasure looking through them because nature is one thing____really must be experienced. One evening when it was so warm. I stayed ____(wake) on purpose until half past eleven in order to have ____good look at the moon by myself. But as the moon gave far too much light, I ____(not dare) to open the window.

    We usually have three meals a day, breakfast, lunch and supper. Which meal will

    c____ us the fewest health problems if we have to miss one ? Most people would rather not have breakfast, especially teenagers. They just eat some snacks or fast food i____. What will happen if we do like this?

    Many scientists and doctors in the field of health consider breakfast to be the m____ important meal of the day. If we eat a good breakfast, they say, we will have e____ energy we need to begin our working day. They remind us that our bodies burn the energy from food within four hours. A____ we may use up less energy while we sleep, it's a long time until morning and we still wake up with the need for a lot more fuel.

    One recent study c____ out in the USA tested a large number of people from 12 to 83 years old. These people were given different kinds of breakfasts, and sometimes, some of them didn't eat breakfast completely. The r____ showed that if a person eats an adequate (充足的) breakfast, he or she will work more actively than that who eats a very poor breakfast or doesn't eat breakfast. It also showed that children don't do well if they go to school w____ eating breakfast. They can't focus on their lessons for a long p____ of time when their stomachs are making some noise. In addition, the study suggested that avoiding breakfast may i____ the chance of a heart attack.

    To sum up, none of the three meals can be missed. We should find time to make proper meals and then enjoy them.