笛子是怎么发声的

My bike____(break down) on my way to school ,so i was late 悉尼歌剧院全世界闻名.Sydney Opera House is __ all over the悉尼歌剧院全世界闻名.Sydney Opera House is __ all over the __. 悉尼歌剧院 SYDNEY OPERA HOUSE怎么样 关于高中椭圆的题.已知椭圆的方程为x^2/16+y^2m^2=1,直线y=根号2/2x与该椭圆的一个焦点M在x轴上的摄影恰好是椭圆的右焦点F,则m的值是.需要有一点过程.是y=根号2x/2 高中椭圆题,已知椭圆x^2/a^2+y^2/b^2=1(a>b>0)的三个顶点B1（0,-b),B2(0,b),A（a,0),焦点F（c,0),且B1F垂直AB2,求椭圆的离心率 椭圆x^2/25+y^2/16=1上一动点p,已知A（4/3,4）和右焦点F（3,0）求3PA+5PF的最小值 椭圆16x^2+25y^2=400的右焦点C(3,0),过C的直线交椭圆于A B两点,且CA=2CB,求这样的直线. 分析英语句子 the teacher said that that that that that boy said was right我们英语老师叫我们分析这个句子,分析得好的加学分,分析句子的成分, 一道初中英语选择题,求讲解 The teacher said there ＿＿＿ no classes the next Sunday A.is going to be B.is going to have C.were going to be D.would have That teacher said that that that that that boy used in that sentence was not correct. I am looked at by him.这句话对吗?look at 是不及物动词词组,可以有被动语态吗? his mother looked after him as well as she could 请问as well as 和she could是一个什么样的词组我只知道as ..as possible, 不及物动词短语有没有被动语态 What are the advantages and disadvantages of learning English on the Web 怎样答好高中政治大题 本人正念高一,政治大题总答不到得分点,由此特别苦恼, The doctor saved the child last night.（改为被动语态） 用英语解释下列句子 1.Why don't you pump the bike?2.Saving water is very important.3.It took me 5 years to learnEnglish.4.We can't live without water.5.I didn't go to bed until he came back. too,very,enough填空的英语题1 I couldn't speak to the boss.He was ____ busy.2 I couldn;t go out.It was _____ cold for me to go out.3 I could answer all the questions.They were_____ easy.4 Is that suitcase light______for you to carry?5 Is your br You may lead a horse to the water,but you cannot make him drink.的英文意思解释 Please cool the water first.怎么用英语解释据子?1.Please cool the water first2.Trees live longer than animals3.That watch belongto me 4.Did they fly to New York last week?5.In my opinion,factories should stop pollution.怎么用英语解释 英语翻译 考试被老师冤枉作弊怎么办? What is wrong with your bike=Is there____ ____with your bike What's( )( Oh,my bike is broken.一空一词 What is the ------- of your new bike?回答是It is 500 yuan. AZ31B镁合金的NB:YAG激光焊接具体的焊接工艺参数是多少?焊接功率.保护气体种类.流量分别是多少 中秋节的真正含义是什么? 中秋节的含义是什么 中秋节是什么意思? 中秋节有什么含义 英语翻译你10分钟就可以走到博物馆?但是这个不是要翻译成10分钟后么?