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python怎么控制小数点位数?比如float类型a=1.23456789,我想把a转化为a=1.2345的形式,这个怎么转化呀? 我们愿意自己多辛苦.我们不能给别人增加麻烦.用关联词连成一句话.（要读起来通一点的）一定要通一点的! 初三数学一元二次方程x2+x-5/4=0x2+x-5/4=0化为（x+m）2=n(m,n是常数,n大于等于零）的形式题中2为二次方 初三数学题(1+x)(1-|x|)>0,求x解集 英勇不曲.一泄万丈.嫌一点儿钱.还有写出查找成语错别字的网, 形容人多力量大的词有哪些? 形容人说话能力一般可以用什么词代替 英语作业,用适当的介词填空.对的一定采纳,谢谢!1,Tom is [ ]home, he' s not [ ]school.2,Look ,there are many apples[ ]the thee and Mike is[ ]the tree.3,An old man is [ ]the tree.4,It' s m ap [ ] China.5,I can see some cakes [ ]the pla 求钝角,锐角的对应边与三角形三边的关系可见初二上册数学伴你学27页的能力挑战1根据勾股定理求 锐角三角形中可不可能有钝角?SOS 用适当的介词填空.对的一定采纳,1,Tom is [ ]home,he' s not [ ]school.2,Look ,there are many apples[ ]the thee and Mike is[ ]the tree.3,An old man is [ ]the tree.4,It' s m ap [ ] China.5,I can see some cakes [ ]the plate.6,Our reading room 英文题：根据首字母填写单词1.I have a l_____ sister.2.I often w______ baskerball 办事的能力是什么词语 根据字母开头填写单词1unemployment is one of the main problems of m---times 2when we are learning alanguage ,we should know about its c------ 3the english spoken in the news is mostly s-------english 4the g-------is trying its best to bring 形容办事稳妥的词或者与这个相关的其它文化或者东西,最好是不要太直接的那种.太直接了没有什么蕴意,要有文化在里面,我们5000年的历史文化去哪里了.或者小句子 首字母提示写单词When I f____ ate in a western restaurant,I didn't know w___ I was supposed to do.Everything was unfamiliar.I was used to e___ with chopsticks and a spoon,but I had to eat with a k____,Question c____ my mind.Was I supposed to b 找成语中的错别字谢谢. 英语题、根据首写字母补充单词、1.He likes having a p______ class because he likes his teacher.2.Meimei is r______ a motorcycle on the road.3.I think doing my homework is b_______ . 什么词用来形容能力?比如 提高 增强等 成语中常见的错别字有哪些? sinA+sinB=√3/3(cosB-cosA),且A属于（0,π）,B属于（0,π）,则A-B等于?（√表示根号）大神们帮帮忙 为什么A B是三角形的内角就SINA与SINB不等于0? 单词,根据首字母填单词,1个not including;but not 5.e()()()()() 英语:根据句意和所给首字母填单词!1.How many a_______are there in the zoo. 2.Where is the cat?I can't f_______it.3.I'm a Chinese boy.My f_____name is my family name.4.His a_____is at Zhongshan Road.5.Are their n______Lucy and Lily?6.Mrs. 形容国家的灾难用什么词 国家的政治、经济、军事等方面力量强大形容一个词语 形容各个国家的词语比如说：浪漫的法国······ 形容誓死保卫国家的诗句 谁知道21世纪英语报的邮发代号啊?说下``谢谢`` 21世纪英文报（高三版）的邮发代号是多少?邮发代号!最好刊号也写出来 a/sinA=b/sinB,那么a是否等于sinA,b是否等于sinB是在三角形中 21世纪英语报高中版的代号