题目

有限的元素可组成种类繁多的物质。依据表中元素回答下列问题。 元素名称氢碳氧氯钠铁 元素符号HCODNaFe （1）某固体单质在氧气中燃烧火星四射，生成黑色固体。写出该反应的化学方程式                                 。 （2）若某固体单质在完全燃烧和不完全燃烧时，生成不同的气体，该固体不完全燃烧时反应的方程式为                       。 （3）若某可燃性气体由两种元素组成，一定含有的元素是        Reading for pleasure(消遣) is the easiest way to become a better reader in English. It is also the most important way.Some students say they don’t want to read for pleasure. They say they want to use their time to learn the rules of the language and new words. They say that pleasure reading is too busy.Many experts(专家)say pleasure reading is very important for learning English. Dr Stephen Krashen, a famous expert on learning languages, says that pleasure reading helps you learn many important things about English. Students learn more grammar and more words when they read for pleasure. They also learn more about good writing.Dr Krashen tells us that pleasure reading helps each student in a different way. Each student needs to learn something different. Pleasure reading makes it possible for each student to learn what he or she needs.Reading for pleasure is not the same as studying. When you read for pleasure, you choose your own books, and you don’t have to remember everything. There are no tests on your pleasure reading books. Pleasure reading will help you：·learn how English speakers use English·read faster in English·find examples of good writing in English·learn new words·learn about the culture of English speakers1. Many experts say students learn more ___________when they read for pleasure.A. grammar and listeningB. listening and spellingC. listening and speakingD. grammar and words2.Each student needs to learn ___________by pleasure reading.A. something difficultB. something differentC. something easyD. something important3.From the passage, we know pleasure reading makes it the most impossible for each student to___________________.A. find examples of good writing in EnglishB. learn new wordsC. learn how English writers use EnglishD. read faster in English4.The passage is mainly about _____________.A. pleasure reading in a different wayB. pleasure reading in the same wayC. pleasure reading in an easy wayD. pleasure reading in an important way