题目

已知：如图，抛物线y=a（x﹣1）2+c与x轴交于点A（ ，0）和点B，将抛物线沿x轴向上翻折，顶点P落在点P′（1，3）处． （1） 求原抛物线的解析式； （2） 学校举行班徽设计比赛，九年级5班的小明在解答此题时顿生灵感：过点P′作x轴的平行线交抛物线于C，D两点，将翻折后得到的新图象在直线CD以上的部分去掉，设计成一个“W”型的班徽，“5”的拼音开头字母为W，“W”图案似大鹏展翅，寓意深远；而且小明通过计算惊奇的发现这个“W”阅读下面短文，并根据短文后的要求回答问题（请注意问题后的字数要求）。 [l]Fear and pain are two of the most useful things that human beings and animals have, if they are properly used. If fire did not hurt when it burnt, children would play with it until their hands were burnt away. Similarly, if pain existed but fear didn’t, a child would burn himself again and again, because fear would not warn himself to keep away from the fire that had burnt himself before. A really fearless soldier is not a good soldier because he will soon be killed; and a dead soldier is of no use to his army. Fear and pain are therefore two guards without which human beings and animals might soon die out. [2] In our first sentence we suggested that fear should be properly used. If, for example, you never go out of your house because of the danger of being knocked down and killed in the street by a car, you are letting fear rule you too much. Even in your house you are not absolutely safe: A plane may crash on your house, or you may get cancer! [3] The important thing is not to let fear rule you, but to use fear as your servant and guide instead. Fear will warn you of dangers; then you have to decide what action to take. [4] In many cases, you can take quick and successful action to avoid the danger. For example, you see a car coming straight towards you. Fear warns you, then you jump out of the way, and all is well. [5] In some cases, however, you decide that there is nothing that you can do to ___________. For example, you can’t prevent a plane crashing onto your house. In this case, fear is no longer of any use, and you have to try to overcome it. 1.What is mainly talked about in this passage? (no more than 15 words) _________________________________________________________________________ 2.How does the author support his idea in Paragraph 2? (no more than 5 words) _________________________________________________________________________ 3.Why does the author say that a fearless soldier is not a good soldier? (no more than 15 words) _________________________________________________________________________ 4.What benefit can we get from “fear” according to the passage? (no more than 10 words) __________________________________________________________________________ 5.Fill in the blank in Paragraph 5 with proper words. (no more than 5 words) __________________________________________________________________________