平均速度

如图,A、C、D、B在同一直线上,AC=BD,CF=DE且CF//DE.说明AF//BE 如图,已知点A、B、C、D、E在同一条直线上,且AC=BD,E是线段BC的中点（1）点E是线段AD的中点吗?请说明理由（2）当AD=10,AB=3时,求线段BE的长度 小时代1.0电影主要内容要多具体一点啊,最好写出每个场景发生的事. 如图,BD⊥AC,CE⊥AB,垂足分别是D,E,∠B=38°,求∠C的度数. 新学期 新面貌主题班会的串联词 快 古村又变新面貌 （打一“植物学词语”） 今天上午我去了银行 I went to the bank ___,____ 用英语怎么说 英文作文,the day I went to.要求：Title :The Day I Went to…Words:160-180Use the grammar you have learnt - the simple past tense- Prepositions for talking about transport:by/ on/ off/ in/ out (of) -Adverbs of sequence,ect作文的中文解释 I ___ (study) English since I went to the pI ___ (study) English since I went to the primary school. It's safe to () the traffic rules怎么写呢?括号里可填：A.follow；B.remember；C.know 2个帮我写出单词 写出两个带鼎的词语是成语 如图所示,AD是△ABC的角平分线,是判断BD/CD=AB/AC是否成立 intensity counts什么意思 请写出可以转换的单词2个 △ABC中,AB＞AC,AD为∠BAC的平分线,求证AB-AC＞BD-CD "consequently "在这句话中怎么理解?Often one of the reasons for the mandatory use of a provided factory is that you will consequently get help with dirty checking. consequently有毫无疑问的意思吗有吗? 电能是指什么怎么计算? 怎样记住consequently是因此、所以的意思?如题 机械功率是指什么? I went to the bookstore by bike.是什么意思 i went to the bookstore _______ a dictionary .A.buy B.to buy C.buying D.bought Tourette's syndrome是什么意思 高中的一道英语语法题 The ship changed its course……The ship changed its course___there was a storm.A.on the account B.on condition that C.because of D.because 那就是条件状从咯?但是on condition that 不应该是主将从现吗? 俄国农奴制改革结果是什么 as a result和 hence 区别 hence,because 有什么区别 配置~电源~总功率的问题我的配置算下来得320W左右!CPU Q9300主版 微星 P45或者P43显卡GTS250 1GB内存 6G光区键盘鼠标算下来得总功率是320W,不知道这总功率说的是额定还是峰值呢?我想买个宽幅王 policewoman YuanYuan likes helping people.She likes English.She often helps tourists find their way.She goes to work by motor cycle. 英译中的课文翻译 一共有三段(1.)Our prehistoric ancestors at first knew little about the world the world except for hunting,bcause hunting is the basis of survival. Their needs were few and simple, and the tools they used were limited. As the office is very ______(clean),we haye not cleaned it for seven days