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要上下册都有 分开的 求上册的教学计划再有就是 上下册的教参 苏教版小学《科学》四年级上册期末重点复习题 六角幻方的公式规律是什么请问大家六角幻方有什么公式规律吗? 谁知道六角幻方 求出幻方中的x.(幻方中每列、每行及每斜行的数加起来的和相等) 画图写上来求出幻方中的x.(幻方中每列、每行及每斜行的数加起来的和相等) 画图写上来 My parents went to birthday party yesterday,__ me alone at home.A.leave B.to leave C.leaving D.left请高手给个确切的答案,再讲下其中的语法知识, I with my feiends went to Ann's home for a birthday party.语法有错误吗?快速,I with my feiends went to Ann's home for a birthday partyI with my feiends went to 意思为：我和我的朋友去了安的家里参加生日聚会 I went to a party with my friends,but I went home（ ）an hour because it's boring A in B after I would like to j___ my friends to my birthday party.中,——上填什么 a birthday party,had,at my home,l 苏教版四年级下册科学教学计划 几何题 On my birthday I got some presents.的同意句some 可以换为那两个单词? my mother gave me some flowers on my birthday(变否定句 i eat the birthday cake_____my birthday with some friends填空 i bought some presents for my friend.画着presents如何提问,some摆在哪? 一道几何题,在△ABC中,∠ABC=100°,∠C的平分线交AB边于E,在AB边上取点D,使得∠CBD=20°,连结DE,求∠CED的度数 求河北人民出版社科学四年级上册教案和教学计划求四年级上册上海科技教育出版社，科技活动，教案！ l'll get some e-mail messages from my friends on my birthday.（同义句转换）my friends will_____ _____(两格）some e-mail messages on my birthday. A:-I've just got a birthday card from my pen friend.B:Let me have a look. Wow. ____ nice birthday.A: what B what a C how D how a选哪个啊!谢谢按照我学的知识认为选B 但是某个S B学校的英语老师偏偏说选C 介词on与in的用法?长在树上的东西和落在树上的东西怎么区分?课本与教材不符,不知如何讲解? 如果我要写一个英语句子：”苹果在树上”,那介词是on 还是in?为什么? 苹果长在树上是用介词"in" 还是"on"?猫爬到树上去,又用哪个介词? 原来就在树上的介词用IN还是ON 在树上的介词on和in要怎样区别? 已知方程4x-y=10中,x与y互为相反数,求x,y的值 已知方程4x-y=10中,x与y互为相反数,求x,y. 江湖救急!五年级的几何图形题.根据每个正方形的边长,计算每个图形里的阴影面积.积分不多略表心意, 在2元一次方程4X-3Y=14中,若X、Y互为相反数,X=?,Y=? 初二数学几何江湖救急啊! 1.lan and Eelan are my friends.2.today is his birthday .3 .lt's my birthday first in the US以上句子有语法错误吗,有的话告我原因,这都是我自己写的 today is have some important friend