已知椭圆C:x2/a2+y2/b2=1（a＞b＞0）的离心率为e=√2/2,过焦点且垂于长轴的弦长为

begin with =start with吗 begin with与start with一样吗?什么区别? there is still plenty of time for them to score there were ( )going to Hainan Island for their holiday at that time.用think about 的适当形式填空 "how to learn a foreign language'初三作文要的是初三的或初二的, there are many people there who speak French为什么句孑中间有there,能不能去掉 begin/start with 造句 How fast__________________________(you/drive)when the accident__________(happen)? 英语翻译1众所周知,中国是世界上人口最多的国家.2在这儿所说的话都应该保密3她是否参加会议无关紧要4我们要怎么去那儿还没有定下来5我们何时开运动会要根据天气而定6谁最后离开办公 英语阅读,the USA,there are many types of restaurants.Fast food restaurants are very famous.You can find McDonald's and Kentucky Fried Chicken in many countries around the world.You look at a menu above the counter,and say what you'd like to eat.Y There are many different___(种类)of food in fast food shops I dont think there is anything to worry about ,____(反意疑问,是do I 还是is there) 文艺复兴时期西方美术的突出特点 求一篇英语作文,标题How to Master a Foreign Language,80字左右. 请问一道关于法语【过去完成式】倒装的问题!过去完成时的倒装疑问句怎么倒装?过去完成时的自反动词有2个代词,2个动词怎么倒装?还有以上否定是怎么样的顺序? 问法语倒装的problemCombien d‘etudiant y a-t-il dans cette classe?倒装中间为啥是y a-t-il,而不是 il y 关于法语中的重复主语倒装1.比如这个句子:Sophie travaille-t-elle à Beijing 为什么非要倒装呢?句式我能看懂,但不明白这样倒装的意义.这个句子这样写行吗?Travaille Sophie à Beijing 2.还有这个,就括号 英语翻译如题： Where can students use their personal computer?翻译 Noone can replace you!的中文翻译是什么意思? What did you do the day before yesterday?的同义句是什么（只能改What和do? So fast-food resyaurants are a great (h___) to people What do you think of the book ______the day before yesterday?A.that I lent it to you B.I lent it to you C.I lent to you D.which I lent it to you 学哥学姐帮帮哦 So fast food restaurants are a great h__ to peole Fast-food restaurants are a great help to us为什么又有are 又有a到底用单数还是复数啊 there is little time left为什么用left 不能用to leave 瓦尔登湖 读后感 800字800字左右 瓦尔登湖的读后感,600字 It is surprising that he is still a ______ after the war. After the food that we ordered ( ),we began to enjoy the meal.A.served.B.were served.C.was serving D.was served 英语翻译 来自英国是come from UK 还是come from the UK