what goes up and down but doesn't move? 是什么意思?

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• what is it that goes up and goes down but does not move?求大神级回答 句子
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• 1.If your uncle's sister is not your aunt,who is she?2.What always goes up and never goes down?3.What letter should appear next?Y-W-T-P-?
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• 英语翻译Where does the wind come from?What makes the wind move all the time?Scientists tell us that the sun makes it move.When the sun shines on the earth,it makes the earth hot.When the air becomes hotter,it also becomes lighter.The light air goes up.Cool air comes to take the place of the hot air.The hot,light air goes up higher and higher until it becomes cold.Then it comes down again,and the earth makes it hot again.So it has to goes up.When the air m
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• unit 1 self check 下面有题及选项!待选单词：feel ; spell ; write down ; join ; find 1.You should _____ new English words in a vocabulary list;2.If you don't know how to _____ new words,look them up in a dictionary;3.the best way to improve your English is to _____ an English club;4.Another thing that he _____ very difficult was English grammar;5.This kind of paper _____ very soft.答案是不是：write down; spell; join; feel; find.我知道句子的意思,但是不知道正确形式,标准答案到底是什么啊!
• 关于get的短语的意思The child are very quiet.I wonder what they are getting up to.It's your turn to do the washing up and it's no use your trying to get out of it.Hasn't she got over her illness yet?请问这几个关于get的短语都是什么意思啊?
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