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太阳到地球之间的距离是1.5×10＾8km,则太阳发出的光射到地球上需要的时间为 Do your homework at home. I left my homework at home为什么用at?不是left+sth. 请问是I forget my homework at home.还是I left my homework at home.为什么? I'm sorry,I left my homework at home______.A.Not at all B.That's rightC.All rightD.That's all rightCan you understand ______ the teacher said?______.A.whatB.thatC.whichD.howYou'd better _____(not play) in the open air by yourshlf.The students were bu Sorry,I_____ my homework at home A.left B.forgot c.put .D.threwSorry,I_____ my homework at home A.left B.forgot c.put .D.threw I‘m sorry ,Mr.Zhang.I _____ my homework at home(leave ,have left) 英语作文 school rules 形容很有学问的成语 形容某人有学问的成语? 写4个说明一个人很有学问的四字成语 形容真正有学问的却很低调的成语 嫦娥三号什么时候落月? 一句话的英语笑话能有翻译吗,我看不懂! 圣诞节的英语笑话（简短,有中文） 嫦娥二号能飞到哪里? 成为一个发明家要有什么?品质和要求 发明家 能力要求 Her parents（）lunch at home.A.doesn't have B.haven't C.hasn't D.don't have说明理由 we don't have lunch at home 可以说 we haven't have lunch at home吗?后一句等于前一句吗,或者说后一句为什么错了. I have b_____ with my parents at home but have lunch at school 约分应用题东街小学有48盆菊花,36盆绣花球.老师们想把两种花分别摆成两个花坛,使花坛每一行的盆数都相统,每一行最多能摆多少盆花?（列出算式） 问一道应用题,和几道约分一个分数的分子和分母之和是42,把这个分数化成最简分数后是5分之1,这个分数原来是多少?约分题:49分之56=?26分之39= 42分之28=?45分之30=? 应用题遇到约分怎么办? 几道数学约分及计算题.约分：a^2+6a-7/a^2-4a+3x^3-x^2+x-1/x-1(x^2-x-2)^2/(x^2-1)^3(2-x)^3a+c-b/a^2-b^2+2bc-c^2x^3-x^2-x+1/1-x^2计算：(a^2+ab/-c)^3*(-ac/a^2-b^2)^4(xy-x^2)*(xy/x^2-2xy+y^2)*(x-y/x^2) 大家说晚上背单词 看书记得多吗我都是晚上6点开始看书的 可是最近几天 记忆力明显没有前几天的好了 怎么回事 看书看不进去,背单词记不住,老忘,怎么办?有什么好办法吗? 8090里说周思成读书时用哪本书背单词就是8090里说他因为做了手术,被孤立,然后他就每天疯狂的背单词,用的是什么书啊 应用题用约分吗? Jim was at his grandfather's home two days befor改错 his home near the park 改错 一道计算题.能约分的如题、