题目

在宏观、微观和符号之间建立联系是化学学科的特点。 （1） 构成氧气的粒子是(填“氧原子”或“氧分子”)。 （2） 下图是钠、镁、氯、溴四种原子的结构示意图。 ①镁原子的结构示意图中x的数值为。 ②溴原子在化学反应中容易电子(填“得到”或“失去”)；溴化钠是由钠元素和溴元素组成的化合物，溴化钠的化学式为。 （3） 下图为某化学反应的微观示意图。 根据图示写出反应的化学方程式。Childhood was an illusion (错觉）and the illusion was this: everything was bigger. No, I mean everything, not just houses and shops and grown-ups, but colors and flowers and journeys, especially journeys which seemed endless. “Are we there yet, Daddy?”Funfairs (游乐场） were huge things that spread for miles around you with noise and lights and exciting danger. Rainy days at home when you were ill seemed to last for ever. Being a grown-up yourself was an unthinkable distant possibility. Every sound was louder, every game was grander, every pain unbearable. As I’ve grown old, life has become smaller. Tastes have dulled. Surprises have turned into shocks. Days go by unnoticed. How can I regain childhood when it was an illusion? I have only one repeatable and wonderful way and even in this way I can regain only part of that larger world. I can play upon the stage like a child and make the crowd laugh and laugh with them, sometimes helplessly like a child, and then, even though I’m a sixty-one-year-old man, I can almost catch the colors and sounds and stillness of those bigger years when I was little1.How does the author feel about his childhood?A.It was endlessB.It was unpleasantC.He is glad that it is overD.He misses it as a grown-up2.The author thinks that everything was bigger in childhood because ________A.children could not make proper judgmentsB.children were curious and eager about lifeC.things appeared really big in children’s eyesD.to grow up seemed so long for children3.The world seems to have become smaller to the author because _______A.life is disappointingB.time goes by too fastC.he has had too many surprisesD.foods no longer taste delicious4.The author enjoys playing on the stage so as to _______A.act like a childB.live an unusual lifeC.make the crowd laughD.regain his childhood