It's Saturday morning. My parents and I are on a tour bus. There are about twenty people on the bus. Some are from America, and some are from England and Australia. They are all our friends. We are going to the Great Wall. On the bus, there are two Chinese. One is a woman, the other is a man. The woman is good at English. She is talking with us about the Great Wall. The other people are listening to her. They like the Great Wall. They want to see it very much.

Ⅰ．实验室制取CH₃Cl的原理是CH₃OH+HCl（浓） $\stackrel{ZnC{l}_2}{\underset{△}{\to }}$  CH₃Cl+H₂O．具体步骤如下：

①干燥ZnCl₂晶体；

②称取24g研细的无水ZnCl₂和量取20mL浓盐酸放入圆底烧瓶，同时量取一定量的甲醇放入分液漏斗中；

③将分液漏斗里的甲醇逐滴滴入烧瓶中并加热，待ZnCl₂完全溶解后有CH₃Cl气体逸出，可用排水法收集．

请回答：

下列属于我国内海的是（　　）