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24-2x=3怎么解 3分之2X-3分之1X=24分之7怎么解 语文书上五年级园地6漫画父与子作文怎么写?开头，结尾最好好一点 根号(1-2sin40°cos40°)/ (cos40°-根号1-sin^2 50°) 全部根号1-2sin40°cos40° ( ) the women with long hair your mother（）the baby?怎么填什么?A:What's that over there?B:___?A:On the bed B:It's a skirt.A:__skirt is it__?Is it__,Wei Hua?B:No,it's not__.I think__Meimei's.A:Is it new or old?B:It's new.A:___ ___is it B:It's 化简：根号下1-2sin40°*cos40°/cos40°- 根号下1-sin^2 50° ( )man is your father?The one ( )black.A whoes;with B whose ;in C which ;in 6.— What ______ your cousin ______?— She is a bit thin with long black hair.6.— What ______ your cousin ______?— She is a bit thin with long black hair.A.is,look like B.does,like C.is,like D.does,be like7.Class begins.Stop _____ and ______ to 五年级下册语文书园地1作文怎么写 我的英语四级听力答对20题（连填空句子）,快速阅读8题,填词2,仔细阅读2,完形对8个,句子部分正确.请那离及格的边缘远吗？ 数学上是怎样定义"任意"这个词的? 化简根号1-2sin40°cos40°/cos40°-根号1-2sina^2 The man with long hair is Newton.对划线部分提问 划线部分是 with long hair She is a pretty lady __________ long hair A.at B.for C.with D.of countries和country的区别 有一道题there are many 《counties》in the world为什么要填书名号里的那个词? How many countries are there in the 英语完形填空There are many festivals in the Western countries. 关于2009年12月四级成绩的查询同仁们,2009年12月英语四级的成绩什么时候才能查询啊? 2009年12月四级成绩几号可以查询?在哪查? 语文四年级下册人教版30课我要这一课的分段、段落大意、主要内容、懂的和不懂的!时间一天,最好现在就有! the woman has long hair.(用short hair改为选择疑问句） -----------the woman ______long hair__ __? the,hair,who,long,woman,is,with连词成句 急 why have there been some changes in the celebration of the spring festival in recent years?写长一点儿,表示自己的观点就行. there have been many changes_____in my hometown in the last twenty years.there have been many changes_____in my hometown in the last twenty years.A.happen B.happened C.happening D.to happen 设A是两个整数平方差的集合,即A=m²-n²,m,n∈Z(1)求证：若s,t∈A,则st∈A (2)若s,t属于A,t≠0,那么s/t∈A是否成立?若成立给出证明,若不成立举出反例. who do you think the best man is?还是who do you think is the best man请真懂的人说 Who do you____ was the best actor?A.thinkB.think ofC.think aboutD.think over 改正：1)Did you have watched movie?2)I will you in my office.What do you think you done best?和：1)You should eyes contact.2)Mei Zhou is the most safety city.3)My house is near from this college. 已知S是两个整数平方和的集合,即S=｛X｜X=m平方+n平方,m属于Z,n属于Z｝求证. 若s、t属于S已知S是两个整数平方和的集合,即S=｛X｜X=m平方+n平方,m属于Z,n属于Z｝求证.若s、t属于S,t≠0,则S/T=p平方+Q 设集合A={x|x=m^2+n^2,m,n in Z}即集合A是由所有能够写成两个整数的平方和的整数的集合.求证：若s,t in A ,且t 不等于0 ,则s/t一定是两个有理数的平方和. What is the best title of this passage 什么意思