题干

如图,已知抛物线y=ax2+bx+c(a≠0)的顶点坐标为Q(2,﹣1),且与y轴交于点C(0,3),与x轴交于A,B两点(点A在点B的右侧),点P是该抛物线上的一动点,从点C沿抛物线向点A运动(点P与A不重合),过点P作PD∥y轴,交AC于点D.

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同类题5

假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。作文中共有10处语言错误,每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏子符号(∧)并在其下面写出该加的词。

删除:在错的词下划一横线,并在该词下面写出修改后的词。

注意:1  每处错误及其修改均仅限一词;

2只允许修改10处,多者(从第11处起)不计分。

Dear Jack,

    How is everything going recently? I'm writing to tell you something more about my birthday. The other day we hold aparty to celebrate my 18th birthday. I received many presents from my friends and parents, including cards, books, CDs or so on. During the party we sang and danced, having good time. I thanked my friends for his help and company. At the meantime, I showed my sincere appreciation to my parents for bringing me up. Now I grow up, that means I should shoulder more responsibilities. I'll try my best to share more houseworks to reduce their burden. It's high time that I dosomething to repay them.

    How did you celebrate your 18th birthday? I'm looking forward to hear from you soon.

                                                                                                                                                                                 Yours Sincerely

                                                                                                                                                                                        Li Jin

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