如果在空气中声速是340ms-1,则频率为680Hz的音叉在空气中振动时,它发出的声波的波长是___

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课后随堂练习及习题包括复习题吗 You children on their parents on life. What does "poor as a church mouse"mean?A.Someone is very poor.B.Someone is very rich.C.Someone is very hungry.D.Someone is very angry. i think that the effect a teacher has on children is actually greater than___of their parents.A.it B.one C.that D.which 有when放在前面的陈述句吗?要一个句型是这样的when I was ---ing l………有吗? get down to翻译 有一首歌歌词有几句是 you beautiful you beautiful应该是这样的挺经典 You and I are right!The mistake in the us is not a world.I'm sorry!是什么 有when放在前面的陈述句吗?要一个句型是这样的when I was ---ing l………有吗?when I was ---ing l 后面加过去时的 耳提面命什么意思 用when造3个陈述句和问句 (最好打上句子的中文意思) 2012希望之星英语风采大赛全国总决赛 点数上什么时候播放啊?是“电视”上 打错了 that's orange orange.同义句 2012希望之星英语风采大赛团体赛时间不是具体的.我知道要靠证上的时间,不过还没有发证.请问是几月到几月?(团体赛)山东淄博的. We are on good terms.我们关系很好.什么语境下使用啊. environmental和environmentally的区别,为什么有的地方environmentally是adj. we are on good term可以we were on good term 就是变化时态可以吗 商标备案用英语怎么说? 1、Mr.Black drives _____of all the drivers.A most careful B more carefully C most carefullyD more careful2、l_____the lost keys every,but l couldn't_____it.A look,find B found,look C looked for,find D found,look for3、Our headmaster asked us______ 你的打火机掉了,有什么其他含义吗一个男孩(女孩的同学)经常对一个女孩这样说,感觉很奇怪呢 求兄弟姐妹们给解释,请直接发到邮箱pzhult@163.com Li Ping writes -------- in his class.A、more careful B、more carefully C、most careful D、most car 备案确认 英语怎么说 是贬义词吗? during the last twoyears用于什么时态 男人怎样才能让女人满足拜托各位大神 the last decade做主语 后接什么时态 耳提面命的造句是什么? 关于春天的英语句子,带汉语 就是描写春天诗句的翻译 怎样满足30岁的女人谢谢了, 怎样能让女人开心、快乐、满足拜托各位大神 耳提面命成语意思 求立信会计出版社出版的中级财务会计学(第一版)课后习题答案主要是业务题详细答案,书上附的大多没有过程~