薛谭学讴

古代打更人没钟表,倒底用什么计时. 某同学模仿古人用水钟来计时,他找来一个带水龙头的水壶、一个量筒和适量的水.（1）请你帮他设计一下,如何用这些器材来测定时间?（2）这种方法测定时间所产生的误差的主要原因是什么? Rebuilding in Yushu began soon after the earthquake,and it will (last) long into the future.A.reach B.keep C.stop D.last 麻烦翻译一下,并解释一下为什么选D选项 execl 计时 秒后三位我要在EXCLE输入 1：41.533 （1分48秒点533） 该用什么公式 翻译 :Anything else? anything else英汉互译 I think ------necessary to learn Einglish well.中的-------上填it正确吗? 英语翻译We have two special events planned for this Christmas season .The first is a short musical concert that will be held at the Shangri-La Hotel on 13th of December at 5:00pm.Students will be transported to Shangri-La by bus.Afieldtrip notice British 翻译成中文 手表追针计时是什么意思 买了款带秒表的石英手表,除开大三针计时外,还有3个小圈的秒表功能3个小圈分别是十分之一秒,秒,分.现在问题是十分之一秒跑够30圈,也就是一分钟的时候,十分之一秒的针就不转了,只有显示 什么是“怪三针”?有什么作用? 苏教版语文五下23课第一自然段主要写啥急用!暑假作业! Rebuilding in Yushu began soon after the earthquake,and it will___long into the future.A.reach B.keep C.stop D.last 为什么不能用欧姆表测量灵敏电流计内阻 Rebuilding in Yushubegan soon after the earthquake,and it will ___long into the future.Rebuilding in Yushu began soon after the earthquake,and it will ___long into the future.Areach Bkeep Cstop Dlast 要过英语六级要在四级的基础上增加哪些方面的能力? 你在做的工作多么重要 英文翻译 （）you are doing! Are you doing anything tomorrow?Yes,I am playing tennis with Nancy.为什么用现在进行时? are you doing anything special tonight? 苏教版语文九上课文目录是什么?如题 Do you know who will be__to that country?A.send B.sends C sending D.sent .. 例如上上下下的词语 广告多棱镜要一些广告故事. 语文教案,九年级的 有多种方案更佳 谁有九年级的语文专题复习教案.分块复习的. have和has的用法He doesnt have any coffee.这里He是第三人称单数,但为什么用have? No More Rain 歌词 we know ___ travels not so fast as light.A.sound B.sounds C.the sounds D.a sound选哪个,为什么? It ain t gonna rain no more 歌词谁有 I don't know the e____ time now.It's about 7o'clock.怎么填？