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求梯形面积ABCD 在梯形ABCD中,E为对角线AC上一点,AE等于6厘米、CE等于7厘米,三角形ABE面积为21平方厘米,三角形CDE面积为14平方厘米,那么梯形ABCD的面积是多少? 求梯形 ABCD的面积. I entered the classroom,I found some students_____ (watch )TV some ancient coins were （ ）when they were building the new house.A.foundB.found outC.discovered V+to do V+doing V+to do V+doing V+sb to do sth 找出这些动词快啊重赏 非谓语动词里有是to do要么是doing要么是sb to do sth的形式,感非谓语动词里有很多要么是to do要么是doing要么是sb to do sth的形式,感觉好复杂,有没有好的方法去掌握呢,记得话很容易忘啊,还是靠做 现在分词作后置定语怎么用啊?什么时候可以用它?是现在分词短语作后置定语怎么用啊 现在分词作定语后置There is a child crying. 单个现在分词为什么不在名词前 there is a crying child 关于成长的烦恼,我们交流下PS：我是男生. What were you ____ ____ in the yard yesterday evening?（用find out,find或look for的适当形式填空） we were curious to find out what had happed.这里的what是是用法,为什么这样用 It's no good smoking.(普通行为） It's not good for you to smoke here.(具体行为）、good、在两句话中分别作什么成分、不是、use,good,waste,fun,shame,unseless等名词作表语时,常用it作主语,且真正的主语必须用do You don't have much good,I like i like it very much,and ___good for you ___eat too much .It`s not good for you health A:Do B:Not C:Don`t D:Please not 成长的烦恼作文谁知道?还有就是我生病在家几年了，不能写上学的烦恼。 八下 课文 敬畏自然 怎么复述? The woman lost her p------when she got on the bus this morning. 英语：When she picked up this bottle for some vinegar this morning ,to her disappiontment ,there was---- left.A,nothingB,noneC,littleD,any Her face gave her_when she toldHer face gave her___when she told a lie.A offB AWAYC UPD OUT 课文《勇气》如何复述,急用小于200字,明天公开课 关于动力来自于竞争的名人或真实事例!要实例!速要 动力来自竞争的例子{名人) YOU can speak------in front him,but can`teat------in his restaurant.为甚麽选freely,free正确答案是freely free Though___,swimming does us much good.A.it is tired B.tired C.tiring D.we tired out 英语翻译要通顺的…… 像中国话一点 简要复述紫桑葚 Don’t take too much of the medicine;it does you more harm than good if you .A.do B.take C.like D.have选A为什么 复述紫桑葚这篇课文 It never does a boy much good to shoot him A good____(begin) makes half cuccess(成功） How much does the dictionary_____(花费）The book must be that______(登山者） The girl_____(真的）wanted to get the book,but she failed