一夜连枷响到明的意思

问一道定积分题目2 2∫ 3X² dx=[X³] =8-11 1第二步怎么来的 问一道定积分的题目第八题x=sint 那个.书上把最后的结果省略了几步,应该得到∫cot t^2dt=∫csct^2-1=-cot t-t在二分之派的时候不是无意义吗.最后的结果怎么得出来的1-四分之派 请教一道定积分的题如图 在括号内填上合适的词1、坚持（ ） 2、优良（ ）3、优质（ ）4、保持（ ） 我今年英语四级考了427 过了吗2010年6月 可没有证书怎么回事啊可我成绩单也没拿到啊 大一今年能考英语四级吗? 同义句Great changes have taken place in my hometown over the years=1.My hometown2.There have many changes have taken place in my hometown.为什么是主谓结构,谓语是have 还是 have taken place Many changes have taken places in my hometown in r___（近来的）years There have been many changes__in my hometown in the last ten years.A..happen B.happened C.happening D.to happen选哪个?为什么 十进制数57.2转八进制是多少 把40+12+18与15+30+49中两个数交换,可使两式子相等.①40与15 ②12与40 ③18与30那个答案是对的. 五年级下册第七单元数学试卷今年爷爷的年龄（小于100岁）是孙子的6倍,过了几年后,爷爷年龄是孙子的5倍,又过了几年,爷爷的年龄是孙子的4倍.那么爷爷今年是多少岁? 英语四级怎么考?有经验的朋友介绍下! 有英语四级考过六百分的吗?希望介绍一下经验 英语成绩太差 马上又要考四级了 有方法经验传授的嘛 There have been many changes in this place.这句中为什么用have?主语是什么?用have的决定因素是什么 There have been many change in Beijing.(同义句）Many changes ____ ____ ____in Beijing.急 there have been many changes in ______（recently）years请解析 为什么要用形容词 There have been many changes in this city in r___ yearsMr black finds it s____that his daughter doesn't want to travelDon't be a___.We will stay with youWater World attracts many v___ every yearI didn't mean it.I was just___(kid)Jim's parents were ve the,with,I,long,like,woman,hair,blonde 连词成句 2x+3×09=24.7怎么解 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