小榄和小新去买文具,小榄买了一枝2.5元的自动笔,比小新买的一枝钢笔便宜16.7元,两人一共用去多少元?

【5,7,8】=280
5,7,8的最小公倍数是280,所以还需280天.

只是解释了礼仪,没其他实际作用,不能命那个题目

刚才那篇菊花介绍,你要的更长的更详细的
Chrysanthemums are a genus (Chrysanthemum) of about 30 species of perennial flowering plants in the family Asteraceae, native to Asia and northeastern Europe.
The genus once included many more species, but was split several decades ago into several genera; the naming of the genera has been contentious, but a ruling of the International Code of Botanical Nomenclature in 1999 has resulted in the defining species of the genus being changed to Chrysanthemum indicum, thereby restoring the economically important florist's chrysanthemum to the genus Chrysanthemum. These species were, after the splitting of the genus but before the ICBN ruling, commonly treated under the genus name Dendranthema.
The other species previously treated in the narrow view of the genus Chrysanthemum are now transferred to the genus Glebionis. The other genera split off from Chrysanthemum include Argyranthemum, Leucanthemopsis, Leucanthemum, Rhodanthemum, and Tanacetum.
The species of Chrysanthemum are herbaceous perennial plants growing to 50–150 cm tall, with deeply lobed leaves and large flowerheads, white, yellow or pink in the wild species.
Chrysanthemum species are used as food plants by the larvae of some Lepidoptera species — see list of Lepidoptera which feed on Chrysanthemum.
Today’s flowers are not as bright or large as ‘show’ varieties.
Chrysanthemums were cultivated in China as a flowering herb as far back as the 15th century BC. An ancient Chinese city was named Ju-Xian, meaning "chrysanthemum city". The flower was introduced into Japan probably in the 8th century AD, and the Emperor adopted the flower as his official seal. There is a "Festival of Happiness" in Japan that celebrates the flower.
The flower was brought to Europe in the 17th century. Linnaeus named it from the Greek prefix chrys-, which means golden (the colour of the original flowers), and -anthemon, meaning flower.
Economic uses
Ornamental uses
Modern chrysanthemums are much more smelly than people tend to think or believe. The flowers occur in various forms, and can be daisy-like, decorative, pompons or buttons. This genus contains many hybrids and thousands of cultivars developed for horticultural purposes. In addition to the traditional yellow, other colours are available, such as white, purple, and red. The most important hybrid is Chrysanthemum × morifolium (syn. C. × grandiflorum), derived primarily from C. indicum but also involving other species.
Chrysanthemum leaves resemble its close cousin, the mugwort weed — so much so that mugwort is sometimes called wild chrysanthemum — making them not always the first choice for professional gardeners.
Culinary uses
Yellow or white chrysanthemum flowers are boiled to make a sweet drink in some parts of Asia. The resulting beverage is known simply as "chrysanthemum tea" (菊花茶, pinyin: júhuā chá, in Chinese). Chrysanthemum tea has many medicinal uses, including an aid in recovery from influenza. In Korea, a rice wine flavored with chrysanthemum flowers is called gukhwaju (국화주).photo 1photo 2
Environmental uses
Chrysanthemum plants have been shown to reduce indoor air pollution by the NASA Clean Air study. [1]
Cultural significance and symbolism
In some countries of Europe, Korea and in Japan, white chrysanthemums are symbolic of death and are only used for funerals or on graves. In China, white chrysanthemums are symbolic of lamentation, while in some other countries, of honesty.[2] In the United States, the flower is usually regarded as positive and cheerful.[citation needed]
• A Chrysanthemum Festival is held each year in Tongxiang, near Hangzhou, China.[3]
• The "golden flower" referred to in the 2007 movie Curse of the Golden Flower is a chrysanthemum.
• Chrysanthemums are common visual hallucinations induced by the psychoactive Dimethyltryptamine[4]
• Dir en grey's song, "Hydra -666-", references this flower ("jikan douri ni wasuresarareru jinshin jiko ni tamuketa kiku no hanataba " / "Those are the kiku flowers placed for the accident, that we're suppose to forget in a timely manner")

一篇范文,是关于上海的,你可以在稍微修改一下.这样的话会更加的原创哦
对与一个在上海住惯了的人,是无论如何也感觉不出北方冬天那种千里冰封、万里雪飘的寒冷冬景的.上海的冬天从头到脚都透着点温暖的气息,它总是那样蹑手蹑脚,轻悄悄地降临在人们的身边.
上海,是一颗属于东方的明珠,是一颗属于世界的明珠,如此的璀璨,如此的瑰丽夺目.请闭上眼睛：在五彩霓虹灯包围的四周,悠悠浦江水荡然穿流与彩灯的泛光之下,冷风中感觉着这冬天的气息.虽然是冬天,却不算很冷.这就是我理想境界中的冬天了吧!
城市中那一圈装扮上海的炫彩“服饰”,上海人一看到它,心里便踏实了.那伟岸的、高大的幢幢大楼似乎可以包容这冬天的一切寒冷,只有回到呀呀学语的年代,躺在母亲怀里甜美入睡,才会萌生出这样的亲切感觉似的.
小草欣欣然挺立与路边,快活地眨着眼,微风中翩然起舞.油黄的绿意,这是冬天上海的绿色,常引人侧目而视.听,它快乐地歌唱.唱自己的幸运,诞生在这美丽的城市；唱自己的价值,用生命的颜色装点上海.
上海冬天的风是和煦中夹杂着点傲气的.但它不像北方凛冽的寒风,吹得人直哆嗦；更不像北京的风,吹得人睁不开眼.它是一个和善的小精灵,在你踏上劳累的归途时,轻轻拂过你的脸庞送上半点寒意；或是,徐徐吹动你耳畔几缕发丝,奏上一曲浪漫的大自然交响曲.那风吹的声音,犹如一只无形的手,轻轻叩开你的心扉.对于这小精灵的问候,你能撅起嘴吗?你只有“忍”着几丝寒意,出口气罢了.
冬天的太阳,对上海格外偏爱,照得人心头暖烘烘的,照开了人们脸上的笑容.上班族们哼着轻快的歌,高兴地去工作；老人们乐呵呵地坐在院子里唠叨家常的,整理老家当的……
生活在上海,冬天粉装玉砌的白雪世界是无缘相见了.偶尔,从天空飘落的零星雪花,时而夹杂着丝丝细雨,为这座城市增添一份妖娆.这足已使上海人兴奋好一阵子了,有时人们无法分清那纷飞落下的是雪还是雨,但感受到的不是寒冷,而是一份特别的美丽和一种小小的雀跃.
可爱的上海人,总想假装憋气,对外地人埋怨：“这地儿真没劲,老不下雪.”却又总也藏不住心府的快乐与骄傲.
那浦江水不结冰,还吸引了成群远道而来的游客,参观黄浦江畔——蓝蓝的天、高高的楼、潺潺的水,构成了一幅美妙绝伦的图画.登上东方明珠顶层俯视上海,一派美景尽收眼底.
上海——这颗明珠,它的冬天包着美景,包着所有

1、如下图所示,在安装小榄车的过程中,我们利用垫圈提供的()力使小榄车运动起来.垫圈的数量越多,小车运动的（）.
2、如图为南方雪灾中的一个场景.汽车在紧急刹车时,总是滑行一段距离才能停下来,这是由于路面有冰雪时,轮胎与地面间的摩擦会变（小）,汽车在紧急刹车后滑行的距离将比路面没有冰雪时（长）.给司机师傅驾车时提一个意见（应慢速行驶,不要紧急刹车.）.
3、游泳时,用手和脚向后划水,人就能前进,那么人体前进的推动力来自于（划水时产生的反作用力）.
4、科学技术上统一规定用“（牛顿）”作力的单位,简称“（牛）”,用“（N）”表示.
5、由于摩擦,物体运动会受到一种阻碍运动的力,这种力叫（阻力）.