内能转化为光能的例子

梯形高20CM,角1＝角2＝45度,求面积 有一个等腰梯形,上底为12cm,下底为20cm,已知底角为45度,两个完全这样的梯形拼成的平行四边形的面积是（ ）平方厘米. 一等腰三角形,顶角是45度,高是20cm,算出它得底边长? 形容小巧可爱的词语 2-5字都行阳光点的词语 比如小鸟依人.伊沫.或者什么什么的 女性用. 用“冰”字造几个可爱的词语.如：冰激凌之类的.好的话我会增加悬赏的哦!表示一个可爱的东西的 are no not they (, .)怎么连词成句 no,they are not reps.they are our employees --Are they ( ) buuks?No,they are not .--They are ( ) buuks. He cleans his room every day.（用now替换every day） He usually studies English （用now改写句子）Those boys are playing games（对画线部分提问）There are two libraries in the city（对画线部分提问） "形式上的"英语怎么讲?形式上的,没有世纪意义的,用哪个形容词? 关于保护水资源的作文应该怎么写 不要例文 要提纲~ 那是一首歌 这个作文怎么写,求思路,求提纲,不要复制的和范文作文 那是一首歌怎么写,给个思路 Listen!My brother__(read) English in his room. My brother has two____ (pair) of ____(jean)in his room 英语翻译因为父母比较忙与生意,所以与叔叔生活在一起,由于叔叔是做酒店行业的,所以经常去他的酒店玩,也不知为何,就对酒店有了一种情愫,所以那时起梦想就是成为一个优秀的酒店管理者, RT-PCR结果与蛋白结果相反该如何解释? “大型机械设备”用英语怎么讲 英语翻译这是我们的英语老师,她今年26岁,个子有点矮,但看起来很年青很美丽的、可爱,她的性格善良,很外向,每次上她的课时都很活泼,而且对我们很和蔼,很友好,她上的课很有趣,课后常帮我 they c___ to walk up the Great Wall after a short break. ielts 可以帮我改 ielts作文么?1Television is playing more and more important role in today.But nowadays,more and more people think television broken the relationship of family members.I think this opinion is a little extreme views.I think we h 求改雅思作文改下语法错误再看下大概几分可以吗We can get knowledge from news,but some people think we can't trust the journalist,What do u think?And what do you think is the important qualities that a journalist should have?For mo The details depended on which newspaper you read.为什么不The details depended on you read which newspaper 昌组词有哪些 They went on working after the short break.改为同义句 The Greens went out for a walk after they had supper同义句The Greens went out for a walk __ __ supp After they had a rest,they went on ___A.to work B.working为什么? What's happening to Tom?He_____.A)sounds sadly B)seems sadly C)sounds sad D)seems sad 继续求帮忙改雅思小作文..题目是剑9,TEST1如图.马上就要考了啊.The maps visually reveal the changes of an island,before and after the construction of some tourist facilities.On the top of this,this island surrounded by sea is appr do you often late for school?请问这个句子是哪不对啊,为什么不对啊?那么为什么这句可以用助动词呢--Do you often go to school late? Do you often do a__ after school?空格怎么填 中国古代为什么出数学发现,跟中国的文化有关吗?中国剩余定理李善兰恒等式等等 what do they think of him?