题目

下列转化关系图中，A、B、C、D、E常温下为气体，B、E、F、K为单质，其中F为黑色固体；C、D均能使澄清的石灰水变混浊，D、E均能使品红溶液褪色；I是一种红棕色固体氧化物。        请回答下列问题： （1）C的电子式为    。 （2）检验溶液L中金属阳离子的方法是    。 （3）反应③的离子方程式为    。 （4）F与G的浓溶液反应的化学方程式为    。 （5）气体A的密度为2．68g·L－1（标准状况），通过计算、推理，可确定A的分子式为  。 Charlie’s life dream was to become a soldier（士兵）, but he would never be able to because of his leg condition---he couldn’t stand on his right leg. He was very_______about it.One day, Harris, an army officer, heard the story. After communicating with Charlie’s parents, Harris started to plan secretly to give the poor boy a big surprise.A month later, one day in August 2018, Harris appeared in Charlie’s_______. In front of his classmates, Harris asked the boy, “Would you mind taking a ride with me?”Charlie was taken to the army Reserve Center, where he really_________to go. Harris said to Charlie, “Today you will become a member of our team.” Charlie was too excited to say a word. Charlie raised his right hand and repeated the oath（誓言）_________, “I volunteer to join the army and make all my efforts to protect the people and the country.”Charlie’s parents were so thankful. Harris said that it was simply part of his job, “When I joined the army I made a_________to protect the people, which also means protecting the dreams of a child.”【1】A. sadB. happyC. crazy【2】A. officeB. sitting roomC. classroom【3】A. decidedB. dreamedC. offered【4】A. nervouslyB. loudlyC. hurriedly【5】A. planB. messC. promise