下列关于清真寺的说法，正确的是(      )

①清真寺是伊斯兰教建筑的典型代表

②随着伊斯兰教的传播，清真寺的建筑风格被带到世界各地

③清真寺的建筑风格一般以圆顶寺庙为主体

④清真寺的建筑在世界各地完全相同

    John gets up early from Monday to Saturday, because he must go to school before 7:30 on weekdays(工作日) and go to Drawing Club at 8:00 on Saturday mornings. He usually goes to the bookshop on Saturday afternoon, and after dinner he watches TV until(直到) midnight(午夜).

    He doesn't get up early on Sundays. John's parents both work on Sundays. John always watches TV after he gets up. Then he usually goes to KFC to have a hamburger and some juice for lunch. After that, he goes back home and starts to play computer games until his parents come back. He does his homework after dinner. He usually has lots of weekend homework, so he must spend three hours on it. He usually goes to bed at about 11:00 p.m. on Sundays. He often complains(抱怨) he has too much homework to do.

根据短文内容，选择最佳答案。

民族区域自治制度是指在国家统一领导下，少数民族实行区域自治，设立自治机构，行使自治权。（  ）

西亚地区跨两大洲的国家是（    ）

资料一：石蜡是含有20～30个碳原子的烷烃的混合物，常温下呈固态。

资料二：石油催化裂化中通常使用Al₂O₃作催化剂。

某研究性学习小组在实验室中模拟石油的催化裂化，装置如图所示(部分夹持装置已略)。实验过程中可观察到烧瓶Ⅰ中固体石蜡先熔化，试管Ⅱ中有少量液体凝结，试管Ⅲ中酸性KMnO₄溶液褪色，实验后试管Ⅱ中液体具有汽油的气味。