两个凸透镜组合焦距计算

秋天是什么感觉带给你回忆 人教版六年级上册一到八单元四字词语 秋天在哪里 人教六年级上册5-8的四字词语选几个写一段话,要求语句通顺 六年级上册第四课有哪些四字词语课文是（索溪峪的“野”）不少于十个 Somehow everybody had forgotten that the class clown ,no matter how silly,has feeling too .翻译 When the fire d----- is high,we must be careful.We must not have c--- in the countryside.We must put our rubbish bin.At home ,we must not cook w--- an adult,We must not play near a fire ,It's everyone‘s job not to s----- a fire.首字母填空 秋天的美好还表现在哪里 秋天白天的美表现在哪里? I have something funny___(tell)you. 秋季适合什么发型,秋季好看的发型有哪些 when a fire starts to burn空间链接 My name is Wang Kuang and my sister is Wang Wei.Since middle school,we dreamed about taking a greaMy name is Wang Kuang and my sister is Wang Wei.Since middle school,we dreamed about taking a great trip by bike.when we left college,we finally got the Ever since middle school,my sister Wang Wei and I__dreamed about taking a trip.A.have B.had 为什么?(U3.I) hold sb in sb's 是固定用法吗 孔子是怎样认识富贵与仁德的关系的 孔子的论语,说明孔子是怎样让识仁德与富贵的关系 孔子仁德学说 做人要重“仁德”,这是孔子在做人问题上强调最多的问题之一.在孔子看来,仁德是做人的根本,是处于第一位上面这段文字对儒家“仁德”思想的理解是否正确?请简要说明理由.（3分）【摘自 I keep a diary every day.改为复数形式 I KEEP MY DIARY OF WHAT I DO EVERY DAY 这句话有什么错误 英语的时间表示7点差15,11点半,9点过15.用英语怎么说 名字中的多音字应怎么读?《程门立雪》中有个人物“游酢”,“酢”有两个读音：cu和zuo,那么,“游酢”中的“酢”应怎么读? one's 和sb.' s 有什么区别 ,经常看到有短语如 in sb.'s pocketone's 和 sb.'s 是不是可以通用啊 有知道的,请回复一下, 梵的多音字组词 make diary和keep diary的区别 英语翻译翻译：1.make mistakes 2.keep a diary 3.look it up in a dictionary 4.have conversations with 谁能给我些日常英语服务对话的句子 关于餐饮服务常用的英文对话餐饮服务常用英文对话能告诉我么?最好是有中英文对照的 she's presently engaged to be married to a very nice man and seems very happy.是不是she结婚了? 梵宇僧楼,梵怎么念 梵宇僧楼的梵怎么读