如图所示，闭合开关S，电压表测出的电压是       (                 )
 

根据化合价由高到低的顺序，在HClO₄、KClO₃、HClO₂、□、Cl₂的排列中，□内应填入下列物质中的（   ）

①监督是权力正确行使的根本保证

②不接受监督的权力将导致腐败

③监督公权力行使的制度体系中，宪法监督制度具有基础性意义

④不监督，权力会行使得更好

    My name is Bill. I'm from England. I am a worker. I work in a clothes shop. My wife , Ann, is a teacher. She teaches English in a junior high school. We have two kids: a son and a daughter. They are students. Jim is our son. Now he is in his favorite T-shirt and blue pants. Sally is our daughter. She likes blue very much. Now she is in her blue dress. My father's name is Robby. My mother's name is Diana. They are old and they don't work now. I have a brother. His name is Robert. He is a worker, too. My wife's father is Sam. Her mother's name is Rose. Her sister is Lily. She is a teacher, too.

下列主体中，不希望发生这一变化的是（   ）。