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北京时间晚上21点25加州时间几点 观察以下回文数的规律,照样子写一写. 68+86=154 154+451=605 605+506=1111 我来写：不用写规律 已知1＜a＜4,2＜b＜8,试求a-b与a/b的范围 写一个类似68+86=154 154+451=605 605+506=1111的回文数 86题怎麼做?要算式! 67又68分子67÷67 计算 一班数学测试的平均成绩是92分,记全班平均成绩为0分,则男女各自的平均成绩分别是－1.5分和+1.8分这个班男生女生人数的比是多少? 某班一次数学考试中,平均成绩89分,男生平均87.女生平均92分求男女之比 现在是北京时间2010年08月14日 请问德国现在是北京时间几点 现在北京时间几点了?早上还是晚上? 若a^8=5 b^8=2 则(-ab）^8的结果 3＋5＋7＋9＋...＋93请把算式写下来 93×38= 83×39= 这一组算式有什么发现? 英语好的帮我做三道单选题啊,上课要讲这三道题,大家帮我看看,1,If there was Gone with the Wind in the bookstore,I ____it yesterday.A would have bought B bought C had D may have2,We regret_____them that the construction material stua+utst=ttutt,s、t、u、a分别代表什么数 stua+vtst=ttutt中的a,t,u,s各代表什么数字 求a,t,u,s,分别是什么数字 2012年湖南高考英语单选题.疑问,29.Sorry,I am too busy now.If i ____ time,I would certainly go for an outing with you.A.have had D.had had C.have D.had我刚看到这题时也打算选D,可后来再看前面的那句话,我就犹豫了.这 英语单选题求助 说明原因~My hometown isn’t —— it used to be ten years ago.A what B who C where D which 英语单选题求助 说明原因 Last night we went to Ann’s party——we enjoyed very muchA thatB whichC whereD when 单选题 说明原因Alan_____in a shop.but he_______there these days.A,works,isn't working B,is working,worksC,works not works______are you_______?Our English teacher.The boy in the sea is swimming_____.A.fast B.happy C.careful用适当形式填空 英语两道单选题,请解释原因36.Even when I worked hard, my marks never seemed to_____. A. develop \x05\x05 \x05B. increase\x05\x05\x05C. reduce\x05\x05D. improve44.There are other "ways" which may______better for you.A. suit\x05\x05\x05\x05B 英语单选题,并请解释选择的原因1.___is nice and cleanA.The air todayB.The today airC.The air of todayD.The air2.Are you ____from America?No.none of usA.both B.all C.any D.either3.some students like pop music while_____in their schoolA.oth 任何物体都会发射红外线,那么空气会吗? 一切物体都在不停地发射红外线吗?为什么说一切物体都在不停地发射红外线呢?不是只有在有阳光照射到的地方才会发射红外线吗?全感应水龙头:当人们把手放到下面,水龙头接受到人手发出 为什么物体都在不停的发射红外线? 王小亮的爸爸前年存款年利率为2.43%的2年定期储存今年到期后,扣除利息税20%,所得的利息正好为小亮买了一本价值48.6元的书爸爸前年存了多少钱? 2007的0次方+2的-2次方-（1/2）平方+2009 一个高考英语单选题----题不是很难,解释明白很难,33、I had been working on math for the whole afternoon and the numbers before my eyes.A：swam B：had swum我想知道,and连接两个句子,谓语的时态不该是一致的吗?这 关于高考英语的单选题 请说明原因 my uncle___in taiwan for 20 years,now he has settled down in mainland.A,lived B,had lived C,has lived D,was living 一个极难解释的高考英语单选题24、I didn’t think I’d like the movie,but actually it _____ pretty good.A：has been B：was 请解释A为什么不对,我觉得也对,甚至比B答案更好.如果不能解释清楚,请不要作答, 一个很难解释清楚的高考英语单选题----务必高手进33、I had been working on math for the whole afternoon and the numbers before my eyes.A：swam B：had swum我想知道,and连接两个句子,谓语的时态不该