题目

阅读表达 If you spend some time in an English-speaking country you might hear the term “etiquette”. It means normal and polite social behavior. (3).This may seem like a difficult word at first, but it can be very useful to understand. Etiquette is not the same in every culture or in every situation. For example, standing very close to the person you are talking with is quite common in some Asian countries. However, if you do this in Europe，some people might feel uncomfortable. Even in China，we all know that etiquette is not the same in all situations. Perhaps we thin制取气体实验室常用下列装置：      (1)写出图中有标号仪器的名称：①           。 (2)实验室用B装置制取氧气的化学方程式是                          ，收集装置应选用   （填序号），证明氧气是否收集满的方法是         。 (3)实验室制取CO2也选用发生装置B依据是                              ， 反应化学方程式是                                             ，某同学将制得CO2气体通入澄清石灰水中进行检验，结果澄清石灰水没变浑浊可能原因是                              （说出一种即可）