What's Alice?这是什么意思?急!在线等!

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• What's Alice?这是什么意思?急!在线等!
• 在线急等一道英语完形填空题~Travelling to all corners of the world gets easier and easier,but how well do we know and (1)u_____each other?Here is a simple test.Imaginr you will hold a (2)m______at four o'clock,and what time should you (3)e______your foreign business friends to come?If they are German ,they will (4)a______ on time.If they are American,they'll probably be fifteen minutes early.If they are British,they'll be probably fifteen minutes late.The British s
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• 环戊二烯有2个双键,4个π电子.但是环戊二烯负离子有6个π电子,比环戊二烯多出2个.这是因为环戊二烯负离子与环戊二烯相比,相当于一个H+离去,原来形成C-H键的一对电子成为π电子. 最后那句原来……成为兀电子是什么意思,急,在线等
• what's that over there?let's go and（） A have a look B look for C look D have a look at急……在线等……记得说明理由
• 一道物理题在线等,答得好,再追加分!急!1、为了估测出眼前一座大楼的高度,有经验的人常常采用这样的方法；在眼前竖起一根指头,调整指头到眼睛的距离,直到手指恰好挡住了大楼,只要知道手指的h,手指到眼睛的距离S1和大楼到人的距离S2就可估算出大树的高度H,请写出大楼高度的表达式. 2、给你一把尺,如何简洁地估测出一棵大树的高度?我没学过相似三角形,请问你们谁是对的 这是几年级学的呀
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