题目

有：① 、 、  ②H2O，D2O ③石墨、金刚石 ④H，D，T 四组微粒或物质，回答下列问题： （1） 互为同位素的是．（填序号） （2） 互为同素异形体的是．（填序号） （3） 由①和④中微粒能结合成含三个原子的化合物，其中分子量最大的是（填化学式）． 答案：【1】①④ 【1】③ 【1】T2 {#mathml#}O818{#/mathml#}Books are our best friends．They are very quiet, but we can always find both fun and knowledge once we open them．Here are two good books you can read during the holiday．The little Prince（王子）French Writer: Antoine de Saint-Exupéry（安托万 · 德圣埃克）Both adults and children love this classic book．It is about the adventure of a young prince．It shows the importance of innocence （纯真）, imagination and love．The little prince comes from planet B -612．In his eyes, adults are all very strange．Unlike them, he sees the essence （本质） of things．He cares more about a flower and a sheep than the "important" things of the adult world．The prince lives on his planet with a rose．He loves the rose very much．But he soon feels tired and leaves his planet．He meets many more strange adults on other planets．On Earth, he discovers interesting things such as a snake, other roses and a fox．The fox tells him a secret: Only the heart can discover the most important things．This helps the prince realize his love for the rose and he goes back to his planet．To Succeed on One' s OwnAmerican Writer: Liu YongWriter Liu Yong from Taiwan wrote this book for his daughter．It can help young people succeed．The book teaches you about student, how to use your free time and even what kind of clothes to wear．It answers many teenagers’ most common questions．Liu uses his daughter' s stories as examples to help readers understand the principles（原则）．His book is far from boring．There are lively stories and dialogues, with objective analysis （客观分析）, hope and confidence （信心） from a good father．1.Where does the writer of "The little Prince" come from?A．England． B．France．C．America． D．China．2.What does the prince do after the fox tells him a secret?A．He cares more about a flower and a sheep．B．He meets many more strange adults on other planets．C．He discovers interesting things such as a snake, other roses and a fox．D．He realizes his love for the rose and he goes back to his planet．3.What does "The little Prince" mainly talk about?It' s about _________．A．the adult world B．the planet B -612C．a rose and a fox D．the adventure of a young prince4.Who did Liu Yong write the book "To Succeed on One' s Own" for _________?A．His daughter． B．His students．C．Teenagers． D．Young people．5.From the passage, we know that we can always find_________in books．A．the importance of teenagers’, imagination and loveB．the answers to many of teenagers' most common questionsC．the objective analysis, hope and confidenceD．both fun and knowledge