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把二次函数y=x2+bx+c的图象向下平移1个单位长度,再向左平移2个单位长度后,得到的抛物线的顶点坐标为(﹣1,0),则b+c的值为____
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同类题2

Hi Brad,
    It's good to hear from you again. I find that I'm not good at writing compositions. It's hard for me to prepare the form of a composition and organize sentences. ①Could you tell me how to deal with this problem? I would really appreciate if you offer me some good methods.
Best wishes,
Cindy
Hi Cindy,
    A composition is really a story and any story is told to an audience. There is a form for this and it is in three parts. First, tell them(the audience) what you are going to tell them. Then tell them, and finally tell them what you told them. Parts one and three are short and most of the information is in part two. It works like this.
    Let's say you are asked to write a 200-word composition about your visit to the Great Wall. You would begin with an opening sentence or two saying something like “The Great Wall of China is a national ②landmark that is famous around the world. I visited it last summer and I want to tell you about it.” That uses about 25 words to tell them what you are going to tell them.
    The second part would be about 150 words and would contain information about the Great Wall such as how long it is, when it was built, who built it and why, the fact that it is one of the seven wonders of the world and you would talk about how you felt and what you thought when you visited this national treasure. This is telling them.
    Finally, you would use about another 25 words to say something like “That was my first visit to the Great Wall and it was a very emotional experience to actually touch something so old and famous.③每个中国人至少参观长城一次.I plan to go back whenever I can.” Here, you are telling them what you told them in the story and wrapping it all up into a neat package. This formula(惯例)works for both compositions and speeches and I think you will find it helps to organize your thoughts. I hope it's helpful.
Best wishes,
Brad Franklin

同类题4

阅读下文,回答问题

愿望

    ①一个偏僻的小山村,弯弯曲曲的小路上走来一个中年男人和一个中年女人。他们一路打听,终于找到了那个小女孩的家。女孩正在帮姥姥择从地里挖来的野菜,看到陌生人进了她家的院子,慌忙站起身,躲到姥姥身后。

    ②姥姥站起身,说:“你们这是……”

    ③女人迎上去,握住姥姥的手说:“可找到你们了,这孩子就是杜鹃吧? ”姥姥一听,把身后的杜鹃拉到身前来说:“早听说你们要来,一直盼着呢。杜鹃,快,你城里的阿姨来看你了。”

    ④女人伸出双臂,示意杜鹃到她的怀里来。杜鹃怯生生地走过去,轻轻偎依在女人的肩头,就像依偎在妈妈的怀里,眼神里绽放着纯真的幸福。

    ⑤“哥哥呢?他怎么没有来看我? ”杜鹃把头从女人的肩膀上移开,一双水灵灵的眼睛望着女人。

    ⑥“你哥,他……今天正好有事情,改天他忙完了,我一定让他来看你。”女人的眼里闪过一丝悲伤,但瞬间转成了笑容。

    ⑦吃过晚饭,杜鹃写完作业,就上床睡了。姥姥和女人坐在院子里说话。

    ⑧小村的夜晚很安静,连风都不好意思来打扰,天上的星星眨着清澈的眼睛,一闪一闪,亮晶晶的。月亮悄悄躲在树梢后,听女人和姥姥轻声细语却切切深情的谈话。

    ⑨女人长舒了一口气,说:“这是我儿子的愿望。”姥姥握住女人的手说:“孩子,我知道白发人送黑发人是怎样的一种伤痛。杜鹃的爸妈出车祸那阵儿,我真是不想活了,可是看看杜鹃,那么小的孩子没了父母就够可怜的了,如果再没了我,可就真成了风中草了。”

    ⑩“嗯,不能让孩子看不到希望。”女人轻泣着说。

    ⑪“我儿子说他与杜鹃的血样配型很符合,明天我们就带杜鹃进城做心脏移植手术,我儿子撑不了几天了……”女人轻声哭泣起来。

    ⑫那个草上满是清露的早晨,杜鹃一手拉着男人,一手拉着女人,沿着弯弯曲曲的环山路,走出了小山村。

    ⑬儿子顽强地支撑着自己的生命,在得知杜鹃已来到医院时,带着一丝微笑,永远地离开了他眷恋的父母,离开了他做义工三年帮助的小女孩杜鹃。

    ⑭这个消息,女人没有告诉杜鹃,她不想让杜鹃幼小的心灵再一次受到沉重的打击。

    ⑮杜鹃出院了,女人带着她回到了小山村,看着杜鹃微笑如花的脸,女人心里的一块石头落了地,眼中含着泪花,笑了。

    ⑯几天后,看到杜鹃恢复得很好,女人说要回城了。杜鹃扑进女人的怀里,依偎着抱紧,就像抱紧自己的妈妈一样。

    ⑰杜鹃交给女人一封信,说让她坐上车时在车上看,女人微笑着点头。

    ⑱女人打开信:我知道哥哥的愿望,也知道哥哥和坏人搏斗,受了重伤,也许他就要去我爸爸妈妈去的那个遥远的地方。我那晚偷听了你和姥姥的谈话,我多么不想进城做手术啊,可是我心里也有一个愿望,我哭了好久,为了我的愿望,我决定跟你们进城做手术。我的愿望没有哥哥的愿望那么崇高,但是真诚的,我想说,我的愿望是——我想做你们的女儿,照顾你们一辈子。

    ⑲女人握着信,泪水再一次模糊了她的双眼,不同的是,这眼泪少了几分悲痛,多了几分润心的温暖。