则下列分析都正确的组合是（   ）

①Ⅰ图对应溶液中的溶质为NaHCO₃

②Ⅱ图对应溶液中的溶质为Na₂CO₃和NaHCO₃，且二者的物质的量之比为1：1

③Ⅲ图对应溶液中的溶质为NaOH和NaHCO₃，且二者的物质的量之比为1：1

④Ⅳ图对应溶液中的溶质为Na₂CO₃．

加大金融体制改革力度，要坚决依法依规严厉打击金融欺诈、非法集资等行为，切实保护投资者合法权益。从国体上看这一要求是基于(     )

①人民当家作主是社会主义现代化建设的政治保证  ②专政在社会主义制度中具有根本性意义③专政才能保护公民的合法权益和维护社会正常秩序④保护公民合法权益是我国国体的本质体现

阅读下面短文，从A、B、C、D四个选项中选出最佳选项。

Where does the wind come from? What makes the wind move(移动) all the time? Scientists tell us that it is the sun. That makes air move, and makes it blow(吹). When the sun shines on the earth, it makes the earth hot. Then the earth makes the air hot. When the air becomes hotter, it also becomes lighter(更轻). The light air goes up. Cool air comes into take the place of（代替） the hot air. The hot light air goes up higher and higher until it becomes cool. Then it comes down again, and then the earth makes it hot again, and it has to go up. When the air move, it has wind.