如图是二次函数y=ax²+bx+c（a≠0）图象的一部分，对称轴为x=$\frac{1}{2}$，且经过点（2，0），有下列说法：①abc＜0；②a+b=0；③4a+2b+c＜0；④若（0，y₁），（1，y₂）是抛物线上的两点，则y₁=y₂．上述说法正确的是（　　）

我们党提出，要推进协商民主广泛多层制度化发展，构建程序合理、环节完整的协商民主体系，拓宽国家政权机关、政协组织、党派团体、基层组织、社会组织的协商渠道。这表明（    ）

①协商民主充分体现了政府部门的行政理念和政治智慧

②我国创造性地发展了民主形式，推进了政治文明建设

③协商民主是党的群众路线在政治领域的重要体现

④切实保障政党履行国家职能，为人民当家作主提供保障

    Nowadays more and more Chinese teenagers find life more difficult without their parents. They don't know how ____housework. Because their parents do almost everything for them at home. This is a big problem.

    Joy is 14 years old. One day her parents____away on business(出差), so they asked Joy ____home alone. At first she thought she would be happy ____her parents were not in. She could do what she liked. But it was six o'clock ____the afternoon, she felt hungry.“Oh, it's time ____supper. Where can I get my food?”she said to herself.Later she found some food in the fridge, but she didn't know how to cook.At that moment, she missed her____very much. At last she could only go to the supermarket and____some food to eat.

    Many teenagers are the ____as Joy. So I think they should learn some basic life skills,____as cooking, cleaning their rooms or dressing themselves properly. They shouldn't depend too much on their parents.

读“欧洲西部图”，回答下列问题。