实验室制取少量溴乙烷的装置如下图所示．根据题意完成下列填空：_刷题宝

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实验室制取少量溴乙烷的装置如下图所示．根据题意完成下列填空：

上一题下一题 0.0难度选择题更新时间:2016-06-22 05:10:07

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水螅和涡虫都具有的特征是（　　）

同类题2

已知：①甲醛（HCHO）与葡萄糖化学性质相似，都具有还原性。②甲醛易挥发，甲酸钙易溶于水。为探究过量的甲醛和新制Cu(OH)₂反应的产物，进行如下实验：

同类题3

实施人工增雨的一种方法是用飞机在高空播洒干冰（固态二氧化碳）．干冰进入云层，很快____ 成气体，并从周围吸收大量的热量，于是高空水蒸气便____ 成小冰粒，小冰粒在下落过程中____ 成水滴，水滴降落就形成了雨．（填物态变化的名称）

同类题4

根据装置图回答下列问题（装置用代号表示）：

同类题5

A year has twelve months. My favorite month is October. October 1^st is National Day(国庆节）. We have a seven-day holiday(假期). During the holiday, my parents always take me to see my grandparents.

Our school has some interesting things in October. On the 12th , we have a soccer game. I don't love basket ball. It's difficult for me. But I love soccer. I love playing soccer and watching soccer games. We have a book sale on October 20th. I have three old books and I want to sell them. The art festival is fun. We have it on October 29th. My birthday is also on this day. October is a really great month for me.

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