经纬度地球半径

未成年人应该怎样履行自己受教育的义务 双胞胎的受精问题?生物多年没翻生物书了,也忘得差不多了．是这样子的：两个精子与一个卵子结合,是联体婴；那同性的双胞胎与异性的双胞胎又是如何形成的呢? 人双胞胎是同卵双受精还是异卵受精,还有那龙凤胎呢? Mrs.Brown was very p___ to see her. Mrs Brown was too () to () her childA busy ; look after B busy ; looking after C busily ; look after D busily ; looking after 短文理解：(Mrs Green was eighty years old and healthy.)Mrs Green was eighty years old and healthy.She had a car ,and she always drove to the shops on Saturdays and bought(我怀疑此处错误,不应该用过去时态,her food.She did not drive 社会实践报告可以写关于什么的我仅想到了一个内容,还感觉不合适就是写汽车改装天然气的现状及其原因,分析 谁给我编下面这份社会实践报告实践主题：活动时间：活动地点：寻求帮助或指导者：活动过程基本情况：主要体会和收获： 《钦定宪法大纲》与《中华民国临时约法》有什么不同 《钦定宪法大纲》的依据思想是什么? There was nothing anybody could do是同位语从句，还是定语从句？ 哪个英语单词在德语语里是战神的意思 哪个英语单词在西班牙语里是战神的意思 苹果手机 I phone请问前不久全球发售的苹果I PHONE手机,16G300美元的那种,在大陆怎么买啊? 苹果i phone 4 价格要多少? 摩托罗拉X Phone和苹果5那个好 these are you to my If bring all the cloud of the world for you..will you..love me?谁帮我翻译一下? Frank is my friend .We are in the same class.He is fourteen. 如何回Hello, Just make sure your e-mail address is right, if you can see this, please reply to me. right please let me find you,i can't stand any longer,什么意 There's possibility/hope/no doubt.那么It's开头的后面可以跟什么?比如It's no wonder…… C57BL/6小鼠如何标记 He took out c_____ and took some photos of the sunset C57与C57BL小鼠区别C57与C57BL小鼠有何区别? 有关there be no possibility……这是个固定句型吗?后面是什么 还有什么类似的（我听老师说还有个有OF的……）谢谢 He sent me some photos he took yesterday.这里有两个谓语?怎么理解这句话 c57bl小鼠灌胃量是多少ml/日? C57BL/6J小鼠是什么C57BL/6J小鼠是通过怎么样的处理之后的小鼠?具体是怎样的模型小鼠? He (took some photos ）tthree days ago .对括弧部分提问 六年级的英语试题（带有答案的）急! 明朝赫赫有名的关宁铁骑是谁创建的?