I live in a nice new building in Beijing. It is very tall. It has eighteen floors. There are about eighty families in the building. That is to say (也就是说), about two hundred and forty people live in the building.

    My home is on the twelfth floor. We have two bedrooms and a living room. They are big and clean. There are a lot of big trees and beautiful flowers around our building. I like looking out of the window in my room. I can see cars and buses running in the street. I can see people walking in the street, too. They look so small! I can also see a lot of tall buildings. How beautiful Beijing is! I am happy to live in this nice, new and tall building.

反比例函数$y=\frac{k-3}{x}$​的图象，当x＞0时，随的增大而增大，则的取值范围是（        ）

如图所示，物体P用两根长度相等不可伸长的细线系于竖直杆上，它们随杆转动，若转动角速度为ω，则下列说法错误的是（    ）

2017年十二届全国人大五次会议的参会代表中，少数民族代表有409名，每个少数民族都有本民族的代表。各族人民代表齐聚一堂，共商国是。这表明（ ）

①我国是一个统一的多民族国家

②人民代表大会是我的最高国家权力机关

③各民族人民都是国家的主人，平等地享有参与管理国家的权利

④民族区域自治制度是我国的根本政治制度