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Our English teacher said she _____speak three languages.A.can B,could C.will D.is going to 考卷老是做不完,做练习速度老是很慢,如何快速提高数学和英语的解题速度?练了啊.......,可是每次练习还是都写得很慢,心里想快却怎么也快不起来,稍微一块字就仇,连自己都难认了,怎么办啊. 已知函数f(x)=2根号3sinxcosx+2cos^2x-11、若x属于[0,π/3],求函数f(x)的最大值和最小值.2、若f(x)=-4/5,x属于[0,π/2],求sin2x的值. His talk reminds us _____ (about,of,with)our happy childhood 该选什么好呢? The person we talked about ____our school last week.中缺谓语动词 但talk 就是动词 为什么不能做谓? 求高手帮我化简一下.高一数学,要过程 （2sin²α+2sinα*cosα)/（1+tanα） 初中历史第五第六题 历史题6,龙吻,即正吻、大吻,是置放在古代宫殿屋顶正脊之上的建筑构件.在太和殿正脊两端安放着一对国内现存古建筑中最大的龙吻,张口吞脊、尾部上卷、背插宝剑,高340厘米,宽268厘米.请问 历史题第六题 已知y=3分之1x的平方那么3分之1x的平方--2xy+3y的平方-2的值 已知y=1\3x-2,则3\1x^2-2xy+3y^2-2的值是 是简易方程的全部内容 五年级数学英才考评上册北版答案 五年级上册数学英才考评第6页急! 必须是人教版 George is going to talk about the geography of his country,but I’d ratA.focus B.focused C.would focus D.had focused不是would rather do吗 不尽感激啊完整的题目.George is going to talk about the geography of his country,but I’d rather h Today I'm going to talk about fire ______.(safety) Today I am going to talk about my family是什么意思 is going to ___ a talk about protecting wildlife tomorrow?Who is going to ___ a talk about protecting wildlife tomorrow?A hear B do C give D send 三、根据要求写句子.1、把下面的句子补充完整.（1）今天的雨真大啊,____________________________（2）外面一片漆黑,____________________________2、例：时间好比清风,它能帮助我们驱散心头的愁云；时 第五第六题怎么做 第五、第六题怎么做 请问第五第六题怎么做 帮我第五和第六题做一下吗? 式子25-（a+b）²的最大值是25,此时a,b的关系为 式子5-(a+b)²的最大值是____,当取最大值时,a与b的关系是___ 谁知道快速提高高中数学的解法?我是一高二理科生,现在只有数学一科还在不及格,我很着急,请求帮助 思路和反应应该怎样提高总是上课有一大部分能跟着老师,但下课了自己做就很大部分不懂了.然后自己做题时速度太慢,反应太慢,解题时候的思路总是经过太多无关的东西才全来（做类似的题 高中数学如何提高做题速度和准确率 Today we're going to talk about travelling.would you please say something about the t____ 完形填空：today we are going to talk about sportsToday we are going to talk about sports—sailing（帆船航行）and climbing.Sailing is an exciting（令人兴奋的）sport and climbing is a very healthy sport.Susan is 1 18-year-old girl.Sh