分段函数在某点可导

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Wounded,the brave soldier continued to fight.为什么用Wounded而不是wounding? This brave soldier ( ) his head and charged on.A:bound B:bandaged C:tied D:banded 已知平面π:2x+y+z=3和直线L:x+2y+z=1;x+y+2z=4.求直线L的对称式方程,平面π与直线L的交点.我知道先求 L的方向向量,但是求出来之后,有一个在直线L上的点,我不明白那个点的坐标是怎么来的 直线Y=2X+B与X轴交点坐标是(2,0)则关于X的方程2X+B=0的解是X=( ) 描写秋的元曲,天净沙除外最好短一点(其实也无所谓) They don't like vegetable ()fruit.A.so B.with C.or D.but 英语翻译young people are exposed to millions of messages about who they are and how they should relate to others.Many of those messages do little to encourage the development of characteristics such as kidness ,honesty and self-control. 十首元曲, 用/画出《应有格物致知精神》最后一段的层次,并用简洁的语言概括层意. 英语翻译what this sentence/pic to the utmost extent,reveal is that _.这句话有无语法错误?求翻译 I need a good translation for this sentenceHistory has given Benjamin Franklin a place of enduring fame. 英语翻译This is really good gossip sentence.In fact,a gossip's favorite three words are"Did you know..." If you don't know,you can count on a gossip lover to tell you.这句话的意思 关于rules of class的英语小报 关于思乡的元曲小令六首 描写雨的元曲要3首以上哦~要作者!急要,快. 描写冬天的元曲 描写夏天的元曲 描写秋天的元曲有哪些?元曲要作者还要意思 who know who you are,帮我翻译一下, 请帮我翻译一下 这是什么意思“I KNOW WHO YOU ARE! ”谢谢 求今年6月份的的英语三级答案2010年6月份的的国家英语三级答案 也可以在线联系我明天开始 全国的 在湖南省考 今年六月份的英语三级分数出来了吗? Christmas in BritainIn what way does Christmas and the ways of celebration in Britain reflect western cultural tradition in general and British traditions in particular?Please express it in few words,clear and succinct. 圣诞节时,美国吃什么,英国吃什么? 英国的圣诞节在英国圣诞节期间【也就是最近】天气是怎样的?大家有什么习惯?有没有圣诞假?放几天?从什么时候开始放? 把3个月饼分给4个小朋友,要使每个小朋友分到的同样多,应该怎样分? 不是说专有名词前不加冠词的吗大家请看这句儿:The Eskimos live near the North Pole.这里Eskimos 前怎么加了定冠词? 世界十大死亡 之曲 关于赞颂岳飞的诗 用冠词a,an,the 造句 用适当冠词(a an the 不用填用|表示)1.is it ( )pen of ( )eraser?2.i don't know ( )girl‘s name.3.( )book on the in mine.4.sue is ( ) english girl.5.there is ( ) egg on the table ,and( )egg is big.6.i like playing ( ) foo 关于火山(初一科学题)哪一个对A.火山活动给人类制造了一种壮丽的自然景观,因此火山频繁发生的为好.B.火山喷发带出了地热,使打气温度升高,形成温室效应.