凹面镜成像原理

古文“用之则行,舍之则哉,惟我与尔赴有夫!”翻译 英语翻译 退出用英语如何表达 this book _____be peter's.his is sitll in his bag A.may not B.can't C.mustn't D.must bring sharply into bring...into与bring...to有什么区别求大神帮助 它走得很慢用英语怎么表达可以翻译成：It walk very slowly. 出发动身去做某事 用英文怎么表示啊? 郦道元《黄牛滩》中的“朝发黄牛,暮宿黄牛,三朝三暮,黄牛如故. "朝发黄牛,幕宿黄牛,三朝三幕,只要一句话.Thanks! "朝发黄牛, "朝发黄牛,暮宿黄牛；三朝三暮,黄牛如故"中的“黄牛”依次为_____ _____ 写出三个 "朝发黄牛,暮宿黄牛,三朝三暮,黄牛如故"的译文是什么?译文是什么? bring into effect bring into operation carry into effect...1.bring into effect 2.bring into operation 3.carry into effect 4.come into effect 5.come into operation 这五个词组有什么区别吗?有区别的请再附加例句说明! 英语短语add A into B和add A toB有什么区别 求解释 造成麻烦（或烦恼）的英语词组,中间含有into how do you think i SHOULD RECEIVED THE REPORTER?---WHATEVER YOU THINK OF HIM,TRYto be polite.翻译 How far ______ do you think I should put my stereo speakers?A.away B.alone C.off D.apart He rowed a boat in the park.改为一般疑问句. 李春天的春天所有的经典台词 黄牛滩 写了什么景物?有什么特点? 春天语录 要向诗句一样! she loves puzzle.把它改成一般疑问句注意助动词的添加 Do you think we should accept that offer?-Yes ,we should ,for we such bad luck up till nowDo you think we should accept that offer?-Yes ,we should ,for we such bad luck up till now ,and time out.A.have had .is runningB.had .is runningC.have .has been I think we should protect animals .应该选择:A why not?B yes,very good C I agree with you 找一首歌 歌词开头是“想要对你说,不要离开我...中间有句“雨也滂沱,风也婆娑” 急求rain造句1.为名词2.现在进行时3.一般现在时4.过去时5.原形6 .为形容词 普朗克常数符号h-bar怎样用latex输出?这我书上查不到,如有查这类符号的pdf或doc之类请发到我邮箱caozhu1@yahoo.cn latex 中如何使大括号中的公式有行间效果我试了一下$\displaystyle 输入你的公式代码 $ 结果不行这是我的代码：\left\{\begin{array}{l}\text{Min}=\sum_{i=1}^{12}b_ix_i+\sum_{i=1}^{12}\sum_{j=1}^{12}\frac{a_{ij}t_{ij}}{ who are Is she at ear her?变否定句 为什么国家开头字母要大写?