初中双动点求最小值

已知弧AB＝弧AC,角APC＝60°求证三角形ABC是等边三角形 已知A,B,C,D是圆O上的点,弧AB=弧AC,角APC=60度,证明三角形ABc为等边三角形 “双因素”理论的主要内容是什么? ____of the twins has been there before填BOTH 还是EITHER ________ of the twins has been to England.A.Both B.Nobody C.None D.Neither I've been there before 还是I've been to there before? 地球绕太阳公转一圈的时间为( ). 请问生长周期比较长的观赏性植物有哪些 地球绕太阳公转一圈大约要走多少路程?语言 地球绕着太阳转一圈指的是什么? 如图,两个等腰三角板ABC和DEC如此并放在一起连接AD并延长EB于点F,求∠EFD的度数. I should like the proposal to be read out as it was made 怎么译 如图,α⊥β,CD包含于β,CD⊥AB,CE包含于α,EF包含于α∠FEC=90°,求证:平面DEC⊥平面EFD. The proposal died a bureaucratic death. 如图,∠C=48°,∠E=25°,∠BDF=140°,求∠A与∠EFD的度数我要的是最佳答案，用∵，∴回答不要发些乱七八糟的 英语翻译circulated to its members for comment.When more than one nominee is to be named for an office,prospective nominees must consent to nomination and before giving such consent must be told who the other nominees will be.Which of the followin 英语翻译请问was carried out是被动式吗，可是我觉得这里用被动式有点不通顺，请问这句话直译过来是怎样的。 A bee went to a river to drink.AS it was drinking.the bee carried .翻译全文 比较需要层次理论和双因素理论,为什么后者的理论比较受欢迎? someone must have been here,for the bunch of keys i put on the table before is missing翻译下, 如图,已知三角形ABC中,∠ACB=90°D为BC上一点,DE⊥AB,若∠DCE=∠DEC,已知CD=1.5,BC=4.（1）请说明AC=AE的理由；（2）试求AB有多长 如图,已知在△ABC中角ABC=90°,D为BC上一点DE⊥AB,若∠DCE=∠DEC,已知CD=1.5,BC=41）请说明AC=AE的理由；（2）试求AB有多长好的话 英语翻译We thank you for your email enquiry for both groundnuts and Walnutmeat CNF Copenhagen dated February,21.}f2]Eaw&W As you are aware that there has lately been a large demand for the above commodities.Such growing demand will likely result We ___thank Jane.A .both must B.must both 1.Don't ____me,We _____thank Linda A.thank ;must both B.thank;both must 把这件事既告诉我又告诉她.英文翻译 用both ...and... 英语作文 我难忘的暑期旅行 My unforgettable summer trip 英语作文:my trip plan；60字左右,是关于暑假的英语作文！ The twins___Canada for three weeks.A.has been to B.have been to C.have gone to D.have been intwins解释为双胞胎.那要不要把twins看作是一个整体?还是把twins看作是两个人? 地球绕太阳转一圈要多久? 为什么说我们汉字即使有那么多的形声字,也不妨碍它属于表意文字体系? 如图,E是AB上的一点,（1） 已知∠DEC=∠ADE,可以判定哪两条直线平行为什么?（2）已知∠AEC+∠DCE=180度（3）已知∠AED=∠B,可以判定哪两条直线平行?为什么?