如图是实验室制取和收集气体的常见仪器．请回答下列问题．

（1）写出下列仪器名称①____，②____ ．

（2）实验室制取二氧化碳，若要能控制反应的开始和停止，应选用的气体发生装置为____ （填编号），写出反应的化学方程式　____ ．用D装置收集二氧化碳，气体应从____ 　端通入．

（3）如图B，检查装置气密性的方法是____ ．

（4）实验室在常温下用块状电石与水反应制取微溶于水的乙炔气体，该反应必须严格控制加水速度，以免剧烈反应放热引起发生装置炸裂．你认为图中最适合制取乙炔气体的发生装置是____ ．

阅读短文，下列问题

 B

    The plane took off. A passenger needed a cup of water to take his medicine. An air hostess(空姐) told him that she would bring him the water soon. But the air hostess was so busy that she forgot to bring him the water. As a result, the passenger couldn't take his medicine on time. About half an hour later, she hurried over to him with a cup of water, but he refused it.

    In the following hours, each time she passed by the passenger, she would ask him with a smile whether he needed help or not. But the passenger never paid notice to her.

    When it was time to get off the plane, the passenger asked her to hand him the passengers' booklet(留言簿), she was very sad. She thought that he would write down bad words in it, but with a smile she handed it to him.

    Off the plane, she opened the booklet and then smiled. The passenger put it, “In the past few hours, you have asked me whether I needed help or not for twelve times in all. How can I refuse your twelve faithful(真诚的) smiles?”

物质的分类是化学研究的重要方法之一，近年来发现金星的大气层中含有三氧化二碳（C₂O₃），下列物质与它属于同一类别的是（　　）