春花怒放的意思

解直角三角形的应用某人沿着30度的山坡前进1000米后测得山顶的仰角为60度,又前进1500米便登上了山顶,求山高(保留整数) 解直角三角形,高手进已知角B=2倍角A,AB=2BC,求证角C=90°（在三角形ABC中） 1.These are their books.同意句转换these---- are ---.2.Tom likes eating apples.改为否定句Tom ---- ----- eating apples.3.Sam hates to do {his homework}.对括号内提问4.There are {forty} students in our class.d同上 帮做几道英语题额.Do you often c_____your friend?---Yes,I do.Are these your football s_______?Please put them on.Don't thank g____.Thank Li Lei.Thank you very much.It's a p_____. 1.I'm not sure she isn't coming,but I suppose_____.A.isn't B.won't C.no D.not2.His father never gave him_____.A.may advice B.much advice3.Her work is better than____in the class.A.anyone's else B.anyone elses' C.anyone else's D.anyone else4.He shows 乌鸦兄弟告诉我们什么道理 怎样解直角三角形分情况来说, 总结解直角三角形的一般步骤。 什么是解直角三角形?就是初三要学的那个 A、B两地相距51千米,小王汽车,小刚步行,小王每小时骑车的路程是小刚每小时走的路程的3倍还多1千米.（1）若小王、小刚分别从A、B两地同时出发,相向而行,2又3/7小时后相遇,求小王小刚的速 有什么窍门吗?例如：在三角形ABC中,∠B＝45°,∠A＝60°,AB＝2,则三角形ABC的面积为多少? A、B两地相距51千米,小王骑车,小刚步行,小王每小时行16千米,小刚每小时行5千米.若小王和小刚同时从A地出发去B地,小王到达B地后停留了1又1/2小时,然后从B返回A地,在途中遇见小刚,求此时小刚 （关于解直角三角形）在直角三角形ABC中,角C=90度,角A=30度,AB=5,解这个直角三角形题就是这样的 一道除法算式中,商是除数的4倍,除数是余数的5倍,商与除数、余数的和是416,这题中被除数是多少用方程解 一道解直角三角形的题如图,在△ABC中,∠BAC=120°,AB=10,AC=5,求sinB*sinC的值.抱歉，还没学过正弦定理，能用别的方法吗？ 一道解直角三角形题 求一道解直角三角形的题旗杆那一题,谢 一道解直角三角形的题.急在四边形ABCD中,AC平分∠BAD,AC=7 AD=6 ∠B=60°,S△ADC=(15倍根号3)/2.求BC和AB的长 一道关于解直角三角形的题9.3.如图,△ABC中,AB=AC,BD平分∠ABC,∠A=36°.求sin18°的值.(提示：求出BC/AC=（根号5-1）/2,辅助线过A作AH垂直BC于H)BC^2+BC-1=0 是怎么出来的呢？ 新手求问Matlab中streamline 及 contour函数的用法一组（x,y,u,x）流速数据,其中x和y为二维坐标,u和v为（x,y）处速度矢量的两个分量.用上面两个函数如何画出等速线? matlab contour问题a = ones(500,500); figure('name','叠加显示图像'); b = a; b(10:500-10,10:500-10) = 0; contour(b,[0 0],'r'); hold on;请问contour里面[00]代表什么意思 帮忙看看这段英语有没有错Despit the obvious advantages of XX,it is not without its probiems.For instance,some students get overly interested in XX,thus neglecting theri studies.And some students are likly to get in touch with the dark side 帮忙看看这段英文有错的么Hello,everybody!My name is ××× and my English name is ×××.I'm in Class 1,Grade 1.I like listening to some English songs.My favourite song is WestLife's 《You Raise Me Up》.Thank you! 一道解直角三角形的问题5、如果一元二次方程（m+5）x2-(2m-5)x+12=0(m>0),的两个实数根恰是一个三角形两个锐角的正弦值,求实数m的值. 英语...帮忙看看有没有错误...初学英语...各位帮忙看看有没有错误,有的话应该怎么改?呵呵,水平不咋地,见笑了...1、I bought the house 3 yaers ago.2、He has been abroad for 6 months.3、He always gives me a hand w 英语三级等级考的Ａ卷与Ｂ卷有什么区别? 帮忙看看这段英文有没有错误Today I want to tell you something about SD,Super Dollfie .this is a kind of toy which is come from Japan.The first SD was made by a Japanese.He made the SD for his wife's birthday.And his boss thought it is a g ENGLISH!帮忙看看有没有错误i've been noticed what you mentioned above which you called it"pig-killing-like"sound,anyway,this scared sound probably from your kasperkey.you see,as the anti-virus software has been upgraded a lot,the same as the 8 3 5 5要等于24 读了本文你明白了什么道理?王欢字君厚,乐陵人也.安贫乐道,专精耽学,不营产业,常丐食诵诗,虽家无斗储,意怡如也.其妻患之,或焚毁其书而求改嫁,欢笑而谓之曰：“卿不闻朱买臣妻邪?”时闻 2011年八下科学smj（20）及封底答案 “矜持、内敛”各是什么意思?读作啥?