(红字是答案上解析)而书上不是说车转弯时摩擦力指向圆心吗,那么汽车转向时到底有没有切向摩擦力

banch66992022-10-04 11:39:541条回答

已提交,审核后显示!提交回复

共1条回复
fuxikai 共回答了18个问题 | 采纳率94.4%
答案是c?
怎么看是d?
汽车转向时应该有切向摩擦力,而且切向摩擦力和牵引力相等.
唉,这题也不好说,因为汽车牵引力本身也来自摩擦力.
1年前

相关推荐

在一张白纸上用红颜料写一个字,把它拿到暗室里,只用绿光照射时,红字呈什么颜色
clearlly1年前5
风遗言 共回答了11946个问题 | 采纳率0.6%
蓝色
红字的英文读后感200词左右即可
sssaaafff1年前1
iloveoovzeus 共回答了18个问题 | 采纳率83.3%
The Scarlet Letter offers an extraordinary insight into the norms and behavior of the 17th century if American Puritan society.The basic conflicts and problems of its main characters,however,are familiar to readers in the present.The female protagonist,has borne a child out of wedlock and has been jailed for over three months and sentenced to wear a symbol of her adultery,a scarlet “A” on her dress at all times.It concerns about the moral,emotional and psychological effect of the sin on people in general.It’s not simply a love story or a story of sin.The Scarlet Letter by Nathaniel Hawthorne uses the scarlet letters to symbolize the harshness of Puritan society,showing how they brand sinners for life.
The story happened in Boston about 200 years ago.It narrates love affairs between three persons.The punished woman.Hester Prynne and his husband.Who called himself Roger Chillingworth .He is an old misshapen man and a doctor.Hester does not love him at all.Another man is a young minister,Dimmesdale,who has a high position among ministers and is highly respected among his people in town.Hester and Dimmesdale love each other.But their love is forbidden in that time .It is sinful.Due to this,Hester is punished by society with a letter A on her chest,which considered an evil,a shame.
In this novel,the mainline seems to be around the letter A.Hester is brave enough to face the cruel reality.She is always with a mind of courage.She has been alone with her child for so long ,with litter communication.Shame!Hopelessness!Loneliness!Hester has to wear the letter A day after day,seven years as for punishment and ill fame.
When a woman has lived through a difficult experience,her character changes a great deal.If she be all tenderness,she will die.If she survive,the tenderness will leave her .Hester’s charitable deeds and quiet humility have earned her a reprieve from the scorn of the community.The letter on her chest represents her work on earth ,always helping others,without expecting any thanks.Never afterwards,does that scarlet letter leave her chest.The townspeople no longer view the letter as a punishment ,but rather as representing her great strength and bravery and thy say it means “Able”.
But Arthur Dimmesdale,his sin against Hester and Pearl is that he will not acknowledge them as his wife and daughter in the daylight.He keeps his dreadful secret from all those under his care in the church for seven years for fear that he will lose their love and will not be forgiven.He is too weak to admit his sins.He suffers from mysterious heart trouble,seemingly caused by psychological distress.What’s worse,he is an advisor to the townspeople about their sins.
After Mr.Dimmesdale’s death ,no one changes more in appearance than Roger Chilling worth.All his strength and energy has been used to harm his patient .This unhappy man has made his aim in life to add to the suffering of the young minister.When the evil old man no longer has such a purpose,the devil takes him back to the hell .It is a curious subject of observation,however,whether hatred or love are not of the same place.Each takes a great deal of emotion from one person.The two feelings seem basically the same,expect that one is smiled upon by God,while the other is worshipped by the devil.
我这里正好有一篇
The two lovers has ever decided to flee to Europe,where they can live with their dauthter Pearl as a family .They feel a sense of release there.However,their plan fails…… When Hester dies,she is buried next to Dimmesdale.The two share a single tombstone,with a deep colored letter A shining brightly.
某学生设计了一个“黑笔写红字”的趣味实验,如图所示.滤纸先用氯化钠、无色酚酞的混合液浸湿,接通电源后,用铅笔在滤纸上写字
某学生设计了一个“黑笔写红字”的趣味实验,如图所示.滤纸先用氯化钠、无色酚酞的混合液浸湿,接通电源后,用铅笔在滤纸上写字,会出现红色字迹.据此,回答下列
问题:
(1)①a端是______极②铂片是______极
(2)①铅笔端除了出现红色字迹,还有的现象是______.
②检验铂片的产物的方法是______.
panqw51年前1
yue_xiao_ming 共回答了17个问题 | 采纳率94.1%
解题思路:此为电解氯化钠溶液的实验装置,电解时的阴极反应为:2H++2e-═H2↑,或2H2O+2e-═H2↑+2OH-,阳极发生的反应为:2Cl--2e-═Cl2↑,
总反应为:2NaCl+2H2O
通电
.
2NaOH+Cl2↑+H2↑,阴极溶液呈碱性,滴加酚酞溶液呈红色,以此回答题中各项问题.

(1)用铅笔在滤纸上写字,会出现红色字迹,说明铅笔做阴极,连接电源的负极,即a为负极,则b为正极;铂片做阳极,故答案为:正;阳;
(2)①用铅笔在滤纸上写字,会出现红色字迹,说明铅笔做阴极,反应为:2H++2e-═H2↑,有气泡生成,故答案为:有气泡生成;
②氯气能将碘化钾氧化为碘单质,试纸变蓝,故答案为:用湿润的淀粉KI试纸检验,若试纸变蓝,则有Cl2生成.

点评:
本题考点: 原电池和电解池的工作原理.

考点点评: 本题考查电解原理及应用,难度不大,做题时注意从反应的现象判断电解池的阴阳极入手来解答,注意把握电极反应和溶液离子浓度的变

会计题判断:发现以前年度记账凭证有错误的,可以用红字填写一张与原内容相同的记账凭.
会计题判断:发现以前年度记账凭证有错误的,可以用红字填写一张与原内容相同的记账凭.
发现以前年度记账凭证有错误的,可以用红字填写一张与原内容相同的记账凭证,再用蓝字重新填写一张正确的记账即可
这句话对吗?如果错的,
糖汤躺烫1年前1
yl_wjc 共回答了22个问题 | 采纳率90.9%
【答案】错
【解释】已经登记入账的记账凭证,在当年内发现填写错误时,可以用红字填写一张与原内容相同的记账凭证,在摘要栏注明“注销某月某日某号凭证”字样,同时再用蓝字重新填写一张正确的记账凭证;注明“订正某月某日某号凭证”字样.发现以前年度记账凭证有错误的,应当用蓝字填制一张更正的记账凭证.
会标上的字用什么颜色,有一块红色的横幅开会想给上边写字,用白纸写的红字效果蛮好的,可某个领导说不对
会标上的字用什么颜色,有一块红色的横幅开会想给上边写字,用白纸写的红字效果蛮好的,可某个领导说不对
谁有好的建议说下
sunny19951年前1
TANGCHAOMARTIN 共回答了17个问题 | 采纳率94.1%
我还是觉得用白纸上面打上红的的字,或者就得打完白色黑边的字之后剪下来再贴上去.
(顺便说一声,我们三八妇女节活动就用过红条幅上贴白底红字,效果那是相当的好!)
请你根据浮力知识用弹簧测力计、烧杯水、细线测一小石块的密度,简述实验步骤 . 表达式:如图红字
茉莉清水1年前1
star1994 共回答了26个问题 | 采纳率76.9%
用弹簧测力计测出在空气中重力,除以g为质量,用排水法测出石块体积v,就是等于排开水的体积,所以石块密度等于g分之G除以v排.吧
一个正方体木块,先在他的六个面涂满红漆,然后把它用锯子分成27个小正方体.这些小正方体中有三面涂上红字的有几个,有两面涂
一个正方体木块,先在他的六个面涂满红漆,然后把它用锯子分成27个小正方体.这些小正方体中有三面涂上红字的有几个,有两面涂上红漆的有几个,只有一面涂上红漆的有几个,没有涂上红漆的有几个?
巫云沧海1年前1
光通信出纳 共回答了13个问题 | 采纳率100%
三面红色的有八个,两面红色的有十二个,一面红色的有六个!
数字水表黑字4位红字1位,红字代表什么?怎么读?我的水表字显示00128 8是红字
锵锵名女1年前1
生命守望着 共回答了22个问题 | 采纳率100%
红字代表小数点后一位
有什么方法可以在exle表格中负数不显负号,但合计是按负数来计算的,不用括号或红字来表示,像正数一样
trninglove1年前1
四季 共回答了18个问题 | 采纳率94.4%
选中这一列,设置单元格格式 ,数字-分类中选择“自定义”,在右边设为“#,##0;#,##0”
不定积分问题如图为什么还会出现个c1c2?还有f(x)的原函数不就是fx的不定积分么?为什么红字部分f(x)求的是x的不
不定积分问题
如图

为什么还会出现个c1c2?还有f(x)的原函数不就是fx的不定积分么?为什么红字部分f(x)求的是x的不定积分 好乱啊.
tommyqiu1年前1
白河愁1982 共回答了22个问题 | 采纳率90.9%
答:
题目说了f(x)的导函数是sinx,则必须先求出f(x)=∫ sinx dx=-cosx+C1
所以,f(x)的原函数还必须再进行一次不定积分才可以.
会计:红字冲账发,对于金额错误的情况只能是用于账面多记的吗?
会计:红字冲账发,对于金额错误的情况只能是用于账面多记的吗?
如题:
发生销售费用5 000元,在填制记账凭证时误写为50 000元,并已登记人账,可以采用的正确更正方法是( )。
  A.在记账凭证和账簿上同时采用划线更正法更正
  B.直接撕毁原错误记账凭证,填制一张正确的记账凭证
  C.先填制一张与原错误凭证相同的红字凭证,再填制一张正确的蓝字凭证
D.填制一张科目相同,金额为45 000元的红字凭证冲减错误金额
问题:C怎么就不行了呢?

还是说针对金额错误,红字冲账法只能是D选项的操作才可以?
jitake1年前1
ryuukaienn 共回答了25个问题 | 采纳率100%
我觉得也应该是C,但D也是对的,只能解释为;按照教科书应该选 D.在实际工作中,选C也是可以的.
有人捡到钱里包着红布,红布里面有黄纸,上面用红字写着十二上什么意思
有人捡到钱里包着红布,红布里面有黄纸,上面用红字写着十二上什么意思
有人捡到一个叠成三角形的5元钱,打开后里面包有一个红布的三角包,包里是一张黄纸,黄纸上用红字写着十二上.这是什么啊?懂的朋友来给说说.
有些答案都看不懂呢
easthg1年前1
zhentianyu 共回答了19个问题 | 采纳率73.7%
详细内容打出来 会被屏蔽 或者 “和谐”
最简单的告诉你 烧掉.或者再扔出去.勿留!
带蓝色镜片的人,去看白纸上的蓝字,红字,黄字,则白纸和白纸上的字各是什么颜色
带蓝色镜片的人,去看白纸上的蓝字,红字,黄字,则白纸和白纸上的字各是什么颜色
注意写原因
52tk海1年前1
njz1225 共回答了24个问题 | 采纳率100%
分别看不见字,黑字,黑字
大火烧红了整个天空用英语怎么说啊?主要突出个红字!
tornadojust1年前4
老去的孩子 共回答了18个问题 | 采纳率100%
The fire cast a ruddy glow in the sky
大火将天空染的通红
红字是老师的,下来最后两步再看没看懂了,倒数第二步是怎么出来的?由倒数第三步得到的不是这个啊?不是还缺-2ab-2bc-
红字是老师的,下来最后两步再看没看懂了,倒数第二步是怎么出来的?由倒数第三步得到的不是这个啊?不是还缺-2ab-2bc-2ac吗
隐行的伤悲1年前0
共回答了个问题 | 采纳率
脑筋急转弯。1,太平洋的中间是什么?2,你能用一支笔,写出一个既是红字也是蓝字的字吗?
山城苦丁茶1年前5
yangyonggg 共回答了109个问题 | 采纳率20.2%
[判断题] 发现以前年度记账凭证有错误,应先用红字冲销,然后用蓝字填制一张更正的记账凭证.(
[判断题] 发现以前年度记账凭证有错误,应先用红字冲销,然后用蓝字填制一张更正的记账凭证.(  
A、正确
B、错误
卡哆1年前1
phemily 共回答了17个问题 | 采纳率64.7%
这题应该为B.
记得这题我在考呀呀网站上做过的,发现以前年度记账凭证有错误的,不必用红字冲销,直接用蓝字填制一张更正的记账凭证.
透过红玻璃片能看清白纸上的红字吗?为什么?
Meggieqin1年前1
芝麻油条 共回答了20个问题 | 采纳率95%
看不见,因为透过红玻璃看白纸是红色的,而红字只反射红光,所以看不见
求《The scarlet letter》(红字)主人翁海丝特白兰的悲剧探析的英语论文
求《The scarlet letter》(红字)主人翁海丝特白兰的悲剧探析的英语论文
有没有带摘要,介绍等一套完整的英语论文没 我查的都是汉语也丢了
我要好好爱自己1年前1
cancri 共回答了18个问题 | 采纳率94.4%
Although criticism of The Scarlet Letter for a long time took Dimmesdale as the central character, it has more recently reacknowledged what was well understood in Hawthorne's own time, that Hester is protagonist and center. The narrator allies himself with her and, despite occasional adverse judgments, devotes himself to her cause. His cause as narrator is to obliterate her obliteration, to force the reader to accept Hester's reading of her letter as a badge of honor instead of a mark of negation. The narrator forces us, just as Hester forces her Puritan townsmates, to see her as a good woman on her own terms. In contrast to the two distorted male personalities who counterpoise her-the one obsessed with revenge, the other with his own purity-Hester appears almost a miracle of wholeness and sanity. While these men struggle with their own egos and fantasies, she has real battles-to maintain her self-respect in a community that scorns her, to stay sane in solitude, to support herself and her child, to raise that child to normal adulthood despite so many obstacles. Curiously, though she has been cast out of society, Hester remains very much in the world, whereas Chillingworth and Dimmesdale at the very center of society, are totally immured in their self-absorption. In her inner integrity and her outer responsiveness, Hester is a model and a counterstatement.
Cautiously, Hawthorne advances the notion that if society is to be changed for the better, such change will be initiated by women. But because society has condemned Hester as a sinner, the good that she can do is greatly circumscribed. Her achievements in a social sense come about as by-products of her personal struggle to win a place in the society; and the fact that she wins her place at last indicates that society has been changed by her. Might there be in the future a reforming woman who had not been somehow stigmatized by society? Although in his later works Hawthorne was to answer this question negatively, in The Scarlet Letter the possibility, though faint, is there.
There is more to be said about Hester than space allows; let me confine myself to two points: first, the relative insignificance of her relation to Dimmesdale in comparison with her relation to Pearl-the supersession in her portrait of sexual love by maternal love. The downplaying of her passion for Dimmesdale means that--although she continues to love him, and remains in Boston largely on his account-her goodness and her essential nature are not defined by her relation to a man. Hawthorne does not cooperate in the masculine egotism that he excoriates in The Blithedale Romance by making Hester a mere event in the great sum of man. Hester is a self in her own right portrayed primarily in relation to the difficulties in her social situation, in relation to herself, and in relation to Pearl.
Through Pearl, Hester becomes an image of "Divine Maternity" (1:56). But though so signally a mother, she is not a "mother figure." By detaching her from the social milieu that defines and supports the concept of motherhood, Hawthorne is able to concentrate on the relation of Hester to her child without any social implications. In fact, society in this instance wishes to separate the mother and child. By giving her a recalcitrant daughter as child, Hawthorne has even more cleverly set his depiction of motherhood apart from Victorian ideology. What remains is an intense personal relation that expresses Hester's maternal nature in a remarkably role-free way.
But adult love, sexual love, has not been written out of the story by this emphasis, and this is the second point I would stress. At the end of the work Hester expresses the hope "that, at some brighter period, when the world should have grown ripe for it, in Heaven's own time, a new truth would be revealed, in order to establish the whole relation between man and woman on a surer ground of Mutual happiness." The "angel and apostle of the coming revelation must be a woman" who would show "how sacred love should make us happy, by the truest test of a life successful to such an end!" (SL:263). These are Hester's ideas rather than the narrator's, but he does not distance himself from her at this point. "Earlier in life, Hester had vainly imagined that she herself might be the destined prophetess." Hester could have had this vain imagining only during the very brief period of her secret affair with Dimmesdale, for once she was stigmatized she could have no further hope of living a life such as she describes. But during their affair, she felt that what they did had a consecration of its own-it was this consecration, then, that she wished to put to the test of a lifetime.
Therefore, what Hester means by "sacred love" is really "sexual love," and she looks forward to the time when sex and love can be united by men in one emotion, a time when somehow women can heal the split in the male psyche. As Freud, writing later in the century, was to observe the male inability to feel passion and tenderness toward the same "object," so Hawthorne not many decades earlier found the male's revulsion and fear of sex leading him to separate from women and incapable therefore of love. Hester's letter represents not merely adulterous sex but all sex, and the image of divine maternity becomes even more telling than it seemed at first. Every child testifies to the sexual experience of its mother and is, in a society that finds sex shameful, a shameful object. For Hester to try to return to Dimmesdale by "undoing" her letter is to return to him incompletely, in a manner that denies sex, denies her child. It is no wonder that Pearl objects.
What one senses here--though how opaquely!--is Hawthorne's tentative engagement with the subject of men and their mothers, his suggestion that the relation between men and their mothers was the deepest and most central core of their lives. The great liberation of The Scarlet Letter comes not only from its celebration of a woman, but of a woman who is centrally a mother (73-53).
方差啊啊啊(计量经济学里面的) 上面红字也许写错了没除以N,应该是E(Xi^2)-E(Xi)^2
neonemesis1年前1
名字独一无二 共回答了20个问题 | 采纳率90%
红字部分公式不是求和符号而是期望符号
E(X^2)-[E(X)]^2
应该是这样的
困扰已久的波形图问题早上好,我的问题是图14.3.6.我不懂的地方写着红字,我明白导通截止后的波形图怎么画,但是不明白二
困扰已久的波形图问题

早上好,我的问题是图14.3.6.我不懂的地方写着红字,我明白导通截止后的波形图怎么画,但是不明白二极管电压有时加有时减!我把电路图下面那条线看做是接地,上面三条线两两并,电压相同,利用等式解题,是不是要用到KVL?


有的时候减Ur和加Ur我也弄不清,这个三桥电路是相当三条线并联吗?还是怎么看.
hnllx1年前1
ydhdhjrt 共回答了20个问题 | 采纳率80%
我的理解就是看成三条线并联,你的方法没问题.然后利用KVL写公式,Ur的加减只是你电流参考方向不同而已,无所谓,具体的波形肯定跟电流的实际方向相同.二极管看作一个普通元件就行,再加上它的特性而已.
黑笔为什么能写出红字?
e3dfjle1年前1
ttimtom 共回答了11个问题 | 采纳率81.8%
笔是黑色
无论你用什么颜色的笔都可以写个“红”字
这个红指的不是颜色而且字本身
填写成语1 含有影字的成语2 含有绿字的成语3 含有红字的成语4 比喻类的成语5 夸张类的成语(各写四个)
木糖醇10171年前4
123bgs 共回答了15个问题 | 采纳率93.3%
1.捕风捉影
2.花红柳绿
3.花红柳绿
4.枯木生花
5.口若悬河
我家水表是00835最后的5是红字算多少吨
陈皓天1年前1
9703 共回答了25个问题 | 采纳率88%
一般红字(0.X)不计.
色光的三原色是______、______、______.白纸上写红字,在只有蓝色的灯光下看到白纸是______色的,字是
色光的三原色是______、______、______.白纸上写红字,在只有蓝色的灯光下看到白纸是______色的,字是______色的.
从南至北1年前1
子耘 共回答了27个问题 | 采纳率88.9%
(1)色光的三原色是红、绿、蓝.
(2)蓝光照到白纸上,白纸反射蓝光,有蓝光进入人的眼睛,人看到白纸是蓝色的.
蓝光照到红字上,红字只能反射红光,蓝光被红字吸收,没有光线进入眼睛,人感到字是黑色的.
故答案为:红;绿;蓝;蓝;黑.
A材料的结存栏只有金额没有数量B材料的结存栏只有数量没有金额C材料的结存栏有数量.但金额为红字D材料数量和金额都为红字对
A材料的结存栏只有金额没有数量
B材料的结存栏只有数量没有金额
C材料的结存栏有数量.但金额为红字
D材料数量和金额都为红字
对以上现象说明原因
sprite12811年前1
HansNet 共回答了23个问题 | 采纳率91.3%
A 永续盘存制
B 定期盘存制
C 有未付款材料
D 盘亏
什么题啊,哪的题?
在一张白纸上用红颜料写一个字,把它拿到暗室里,只用绿光照射时,则白纸呈______色,红字呈______色.
i5ikbfur1年前1
清炒空心菜 共回答了14个问题 | 采纳率78.6%
解题思路:不透明物体的颜色是由它反射的色光所决定的,其它色光照在它上面时全部被吸收,只反射与本身颜色相同的色光.

白纸能反射所有的色光,当绿光照射时,它反射绿光,所以是绿色;而红字只能反射红光,当绿光照射时不能被反射,所以字就是黑色;
故答案为:绿,黑.

点评:
本题考点: 物体的颜色.

考点点评: 此题主要考查不透明物体的颜色,属于基础知识,需要掌握.

数字显示的水表,后面的红字数位是小数位吗?
数字显示的水表,后面的红字数位是小数位吗?
数显水表最后一位是红色的,他是代表整数位,还是小数点后一位,
例如:523 3显示的是红字数,是52.3吨还是523吨?
ytmail1年前1
foxzz2 共回答了17个问题 | 采纳率88.2%
绝对是52.3吨.
在一张白纸上用红颜料写一个字,把它拿到暗室里,只用绿光照射时,则白纸呈______色,红字呈______色.色光三原色等
在一张白纸上用红颜料写一个字,把它拿到暗室里,只用绿光照射时,则白纸呈______色,红字呈______色.色光三原色等比例混合得到______.
无边田野1年前1
seiwunsei 共回答了16个问题 | 采纳率81.3%
解题思路:不透明物体的颜色是由它反射的色光所决定的,其它色光照在它上面时全部被吸收,只反射与本身颜色相同的色光.

在一张白纸上用红颜料写一个字,把它拿到暗室里,只用绿光照射时,则白纸呈绿色;红字只能反射红光,不能反射绿光,因此红字呈黑色;色光三原色等比例混合得到白光.
故答案为:绿;黑;白光.

点评:
本题考点: 物体的颜色.

考点点评: 此题主要考查不透明物体的颜色,属于基础知识,需要掌握.

求红字成语,形容女孩子用,不是红颜薄命,红杏出墙一类的啊!四字成语,红字最好排在第三的位置,
求红字成语,形容女孩子用,不是红颜薄命,红杏出墙一类的啊!四字成语,红字最好排在第三的位置,
积极的哦
coolplypig1年前8
乖乖de大米 共回答了19个问题 | 采纳率78.9%
碧鬟红袖
裁红点翠
翠消红减
刻翠裁红
绿鬓红颜
绿肥红瘦
御沟红叶
尤红殢翠
匀红点翠
晓出净慈寺送林子方宋 杨万里毕竟西湖六月中,风光不与四时同.接天莲叶无穷碧,映日荷花别样红.1.诗中的红字,与杜牧笔下的
晓出净慈寺送林子方
宋 杨万里
毕竟西湖六月中,
风光不与四时同.
接天莲叶无穷碧,
映日荷花别样红.
1.诗中的红字,与杜牧笔下的千里莺啼绿映红中的红字意思是否一样?为什么?
xvjd1年前5
hellen311 共回答了20个问题 | 采纳率85%
不一样.因为这里的“红”是一种颜色,而“千里莺啼绿映红”的“红”是代指花.
求问一道高数题目看图,红色笔画出来那里楼主不太明白,红字那里是楼主的想法,我是数学渣渣求问我那样写哪里错了,顺便求问红色
求问一道高数题目

看图,红色笔画出来那里楼主不太明白,红字那里是楼主的想法,我是数学渣渣求问我那样写哪里错了,顺便求问红色笔画出来那里的详细过程QAQ
清颖冷枫是我的1年前3
北极贻贝 共回答了12个问题 | 采纳率91.7%
dx=d(x+2-2)=d(t^2/2-1/2)=1/2d(t^2-)=tdt 没错dt=d(2x+1)^0.5=(2x+1)^(-0.5)dx=1/tdx t撇=dt/dx
dx=tdt 将所有x用t的函数代替就可以了
在一张白纸上用红颜料写一个字,把它拿到暗室里,只用绿光照射时,红字呈什么颜色
clearlly1年前4
小孩子一个 共回答了50个问题 | 采纳率22%
黑色 解析:只用绿光照射时,会看到整张纸变成了绿色,此时字能够看出来,而且是黑色。因为:白纸会反射任何颜色的光。红字红色只反射红颜色的光,对其他颜色的光吸收,所以是黑色。
求函数展开成幂级数!红字是我的问题!
求函数展开成幂级数!

红字是我的问题!
westlifeeee1年前2
咏星 共回答了16个问题 | 采纳率81.3%
∑x^(n-1)/n!=x^0/1!+x/2!+x^2/3!+...=1+x/2!+x^2/3!...
x=0时,第1项为1,其余各项为0
我的水表有5格数字,读数是01352,前四个数字是黑字,最后的2是红字,这是多少吨水,红2是整吨数还是小数,
杰伦妹1年前1
zlfmayflower 共回答了11个问题 | 采纳率90.9%
135.2吨
分别有风字.雪字.雨字.露字.花字.红字.柳字和绿字的诗句
分别有风字.雪字.雨字.露字.花字.红字.柳字和绿字的诗句
各一个,急用,
krantins1年前1
waing16 共回答了16个问题 | 采纳率87.5%
诗中风
1.风劲角弓鸣,将军猎渭城.(王维:《观猎》)
2.林暗草惊风,将军夜引弓.(卢纶:《塞下曲》)
3.野火烧不尽,春风吹又生.(白居易:《赋得古原草送别》)
诗中雪
1.柴门闻犬吠,风雪夜归人.(刘长卿:《逢雪宿芙蓉山主人》)
诗中雨
1.随风潜入夜,润物细无声.(杜甫:《春夜喜雨》)
诗中露
1.可怜九月初三夜,露似真珠月似弓.(白居易的《暮江吟》)
诗中花
1.夜来风雨声,花落知多少.(孟浩然:《春晓》)
诗中红
1.草树只春不久归,百般红紫斗芳菲.(<<晚春>> 韩愈 )
诗中柳
1.碧玉妆成一树高,万条垂下绿丝绦.(<< 咏柳>> 贺知章 )
诗中绿
春风又绿江南岸,明月何时照我还?”
“日出江花红盛火,春来江水绿如蓝
红墨水在纸上写出红字;把红墨水滴在水里水变成红色,这些现象说明了:(1)---------,(2)----------
yuanjintao1年前1
小孩37号 共回答了18个问题 | 采纳率100%
1.分子在永不停息地作无规则运动.
2.分子间有空隙.
如果红色的光照到一张写有红字的白纸上会怎样
糖果的铁皮红盒子1年前6
Olivian 共回答了17个问题 | 采纳率94.1%
纸是红的,字是黑的.
因为人眼分辨颜色是由于反射回来的光线在眼里成像,眼里是什么颜色说明吸收什么色的光.所以红字就要吸收红色的光,白色则是反射全部颜色,所以红光照射到纸上面就会被白纸反射回来,看上去旧时红的,红字则会吸收红光,看上去就是黑的
底部“官窑内造”的花瓶,我有一花瓶底部红字“官窑内造”高33厘米最宽处13厘米,上有彩绘牡丹花鸟并有题诗一首,请问有收藏
底部“官窑内造”的花瓶,
我有一花瓶底部红字“官窑内造”高33厘米最宽处13厘米,上有彩绘牡丹花鸟并有题诗一首,请问有收藏价值吗?
花瓶正面图
笑对人生剑自鸣1年前1
牙牙七七 共回答了9个问题 | 采纳率77.8%
李春,隋代造桥匠师.现今河北邢台临城人士.隋开皇十五年至大业初(595~605)建造赵州桥(安济桥).
某学生设计了一个“黑笔写红字”的趣味实验.滤纸先用氯化钠、无色酚酞的混合液浸湿,然后平铺在一块铂片上,接通电源后,用铅笔
某学生设计了一个“黑笔写红字”的趣味实验.滤纸先用氯化钠、无色酚酞的混合液浸湿,然后平铺在一块铂片上,接通电源后,用铅笔在滤纸上写字,会出现红色字迹,那么断开电源,写的字还是红的吗
wxdlong1年前1
独行客2000 共回答了19个问题 | 采纳率94.7%
不是.通电后,氯化钠电解生成氢氧化钠,使无色酚酞变红,断电后,电解停止,就不会再出现红色了.
红字的合并同类项写过程
红字的合并同类项写过程

蝶舞之灵1年前3
路不平则铲 共回答了14个问题 | 采纳率85.7%
这个真没过程,=c-2a-11
问答题:1.透过红玻璃片能看清白纸上的红字吗?为什么?2.在一个风和日丽的日子,彩霞和几个同学约去郊外野炊,临近做饭时,
问答题:
1.透过红玻璃片能看清白纸上的红字吗?为什么?
2.在一个风和日丽的日子,彩霞和几个同学约去郊外野炊,临近做饭时,他们发现没有带火种,怎么办?现在他们手中只有用透明塑料袋装着的食物,在这种情况下,你能想出一个办法解决他们的火种问题吗?
3.一块玻璃压在报纸上,在玻璃上滴一滴水,通过手滴看报纸上的字,字的大小发生了怎样的变化?
4.花镜的"度数"等于它的焦距的倒数乘以100.请你设计一个实验,粗略测一下一个老花镜的度数.要求写出所用的器材,操作步骤和计算公式.
在这里,.
plmm61年前3
wggwx 共回答了14个问题 | 采纳率92.9%
1.不能看见,红玻璃只能透过红光,红色的字和白色的纸看起来都是红的,所以看不见.
2.用塑料袋盛水,并且将水的形状做成凸透镜状,利用放大镜聚光发热的原理取火.
3.字变大,在玻璃上滴一滴水后,恰好是一个凸透镜的形状.可以看做是一个放大镜,把字放大.
4.一根蜡烛,一个老花镜镜片,一个白纸板,把白纸板和蜡烛放着老花镜两边,蜡烛离镜片足够远,然后移动白纸板,观察纸板上成的蜡烛的像,最清晰的时候测量纸板和镜片的距离就是焦距.
形容红的成语,不能有红字如题
liujia2261年前1
绿林懒汉 共回答了15个问题 | 采纳率93.3%
近朱者赤
白眉赤眼
赤地千里 近朱者赤
白眉赤眼
赤地千里
数学广角的题目(抽屉原理)给下面的每个格子涂上红字或蓝色□□□□□□□□□□观察每一列,你有什么发现?你知道这是为什么吗
数学广角的题目(抽屉原理)
给下面的每个格子涂上红字或蓝色
□□□□□
□□□□□
观察每一列,你有什么发现?
你知道这是为什么吗?
wqh40221年前1
wu_lanlan 共回答了25个问题 | 采纳率88%
什么意思啊
红字带头的成语成语接龙:万紫千红( )-( )-( )-( )-( )一定要成语,越多组越好
挑战梦想1年前6
西北季风 共回答了22个问题 | 采纳率90.9%
万紫千红--红叶似火--火树银花--花红柳绿--绿水青山--山光水色--色彩斑斓
关于光学.在暗室的红光下,看白纸和纸上的红字结果是:A 纸是白色,字能看清楚.B纸是红色字能看清楚C纸是白色,字不能看清
关于光学.
在暗室的红光下,看白纸和纸上的红字结果是:
A 纸是白色,字能看清楚.B纸是红色字能看清楚
C纸是白色,字不能看清楚.D纸是红色,字不能看清楚.
matsuskaa1年前2
唐割睾 共回答了21个问题 | 采纳率85.7%
d
3个简单的导数题,给看看吧图片上一共3道小题,第三题红字是为什么X会等于1. 第二题我算下来等于2,但答案是2分之5,
3个简单的导数题,给看看吧

图片上一共3道小题,第三题红字是为什么X会等于1.


第二题我算下来等于2,但答案是2分之5,
OP组合1年前2
ftmq 共回答了26个问题 | 采纳率96.2%
1) 极限是0,这个当x->0时才是2;
2) (f(3)-f(1))/(3-1)=10/2=5,f'(x)=2x+1,确实ξ=2;
3) f'(x)=(1-x)/e^x,要f'(x)单调增,f'(x)≥0,所以x≤1,这里说的是单调增,不是严格单调增
请教有谁认识 红字的左边+沈字的右边部分,这个字念什么
星如月1年前3
ffff子 共回答了20个问题 | 采纳率95%
紞 国际标准汉字大字典

dǎn
红字 英文读后感300字以内.
晴空的颜色1年前1
谁都不想理 共回答了18个问题 | 采纳率100%
Do you know a little girl's dream of how absurd do?A boring afternoon,watch the rabbits on a Chuaizhuo with this lovely little girl began her fantasy trip.The little girl who?She is "Alice in Wonderland" in the hero - Alice.
The first reading of "Alice in Wonderland",I have a special feeling fresh.Alice's dream of strange,absurd fun,filled with a variety of strange illusions:the ability to change into small body,composed of the Kingdom of the cards can be able to penetrate the mirror world,people forget the name of the small trees,etc.and so on.All this is like our children a colorful dream,deeply attracts us,let us begin to imagine the wings,had enough of the addiction.As I often fantasy:I am a lovely spirit,all day long in the universe to observe a beautiful planet.It was such a wonderful feeling ah!My understanding of "Alice in Wonderland" in the kitchen of the Duchess was impressed.Alice and frogs in particular,the servant of dialogue,let me think that it is laugh.
Re-reading of "Alice in Wonderland," this story,I also found that Alice is a very cute little girl.She innocent and lively,full of curiosity; she also had a compassion and know how to tell right from wrong.In the Alice who can see that our children's pure nature.
Because the entire story is full of fantasy,but the hero is so lovely,pure,how much it closer to our children's lives ah,so I think not only I like this book,I believe other small partners will certainly will be like.
Published in 1865 said,"Alice in Wonderland" and the 1871 book "Alice mirror Hero" swept along with the entire world,has joined after being translated into a variety of Shakespeare's most English language works.
All this is a fairy tale film after one hundred years later in children's literature still shine with brilliant splendor reasons.And that cute little good hero is one of a pearl.She may not be very smart,but she has a pure love,for a gosling are polite.Coupled with her pair of bright eyes,a vivid images leap off the paper girl.
看我写的手老酸了,再加两分吧 爱丽丝漫游奇境记