已知平行四边形ABCD的周长为10cm，AC,BD相交于点O，OE⊥AC，求△DCE的周长？

"自然是一本不隐瞒自己的大书,只要我们读它,就可以认识它"用哲学的观点解析 求大师指导!中心论点:人生在世何不从容生活做自己喜欢的事使生如夏花绚丽?分论点1要想生如夏花绚丽必须珍爱生命 2听从内心声音 请问分论点和中心论点脱接了吗?我是该侧重写做自己喜 怎样指导高三孩子的语文作文写作 高三作文辅导 关于如何审题 什么是“婉约派”、“豪放派”? 选出单词括号里部分的读音相同的一项 tick(e)t A.c(a)t B.m(ore) C.(i)sland D.sh(i)ft 选出单词括号里部分的读音相同的一项 rem(i)nder A.c(a)t B.m(ore) C.(i)sland D.sh(i)ft How is Lily going to the bookstore? 英语翻译A calculation report for the transformers subject of this tender,will be submit,giving evidence that the strength which would occur,if the transformer was tested,are less or equal to the one which has occurred during the test of the above Next Saturday is the day when I am scheduled to leave for America.是什么从句,如果和区分名词从句、定语从句和状语从句,我都晕了.谢谢了. 婉约派和花间派有什么区别? 花间派属于婉约派还是豪放派? 英语翻译Metal shields ofthe control cables shall be grounded at both ends of each cable.Each end of the cable shield shall be weldedto an insulated 600V,PVC,copper ground conductor with 6 sq.mm size and thisconductor shall then be attached to the On his return from his office,he found the house d--根据首字母填空 On his return from his deserted college,he found the house.on one's I went to his house,only ______(find)he was out. 天净沙秋思前三句是第一层,用几个细节构成一幅画面,渲染了什么,表现了什么 英语翻译论文摘要：混凝土也称砼,是当代最主要的土木工程材料之一.它是由胶结材料,骨料和水按一定比例配制,经搅拌振捣成型,在一定条件下养护而成的人造石材.混凝土具有原料丰富,价格 英语翻译The coating of zinc serves two purposes:firstly it covers the iron and prevents its oxidation (rather like a coat ofpaint) and secondly it provides anodic protection.If the galvanized steel isscratched,allowing the air to oxidize some iro 英语翻译In this paper we use an improved tomographic model which was obtained by incorporating in addition threedimensional (3-D) ray tracing in the tomographic analysis in an attempt to account for focussing and defocusing efects due to 3-D mant 根据句意及汉语的提示,完成句子. 可以帮我翻译一下论文摘要吗 They livin' it up at the Hotel California 中的“livin' it up”怎么解释? Hotel California(加州旅馆)如果前面加个the 是什么意思the Hotel California有什么区别the在这里的用处是什么比如说美剧 hero(英雄) 如果加一个 the hero 是什么意思 没有地球自转就不会有昼夜交替了吗? [各国]没有地球自转就不会有昼夜交替了吗? 地球自转与昼夜交替“地球自转产生昼夜交替”这句话有错吗?或者说“昼夜现象与地球自转无关”? 昼夜交替是由于地球自转引起的?我觉的公转也可以阿,只不过交替周期是一年而已阿.为什么不能是公转? 地球自转是怎样产生昼夜交替的,要具体, 带“永熙”两个字的成语或短语 Some words have one sound or syllable and some have two or more .Write the words from the Vocabulary Bank in tcorrect column below. 这几个英语句子没有弄明白在字典上看到关于单词restore 用法restore sth.(to sb.)例句：1) Order was quickly restored after the riots.2) Such kindness restores your faith in human nature.我没有看懂为什么第一个句子是