题目

现有一些物质的用途：用于生产①化肥，②肥皂，③火药，④玻璃，⑤印染，⑥洗涤剂．将以上物质的用途进行分类，并写出分类依据． 分类标准：对应的相关用途为： （填序号） 答案：分析：  根据物质的化学性质是指在化学变化中表现出来的性质，物质的物理性质是指不需要通过化学变化表现出来的性质进行分析． 解：用于生产①化肥，②肥皂，③火药，④玻璃等都需要通过化学变化才表现出来，都是利用了其化学性质，⑤印染，⑥洗涤剂等都不需要发生化学变化就能表现出来，What do you usually do in your free time? Play sports? Watch TV? How about reading books? You must know the Chinese saying: "Read thousands of books; travel thousands of miles” Books are important in our life. Reading books is good for us. It can help us know and understand the world better. It can help us get a lot of knowledge(知识). It brings us a new and different world that we have never been before. Almost all the great men like reading, like Chairman Mao and Madame Curie.In a word, books are helpful to us and we must love them. But before you read, remember to choose a good one. Ask your parents or teachers about what books to read. Be sure you are interested in them. There are many different kinds of books: I like biography(传记) because I can learn something from the characters.What about you? Young friends, please love books and read them, They are very helpful to you.1.Which of the following is TRUE?.A．We have to choose a good book before we start to read.B．Madame Curie doesn't like reading at all.C．We shouldn't ask teachers about what books to read.D．Reading books can’t give us any knowledge.2.What does the underlined part "Read thousands of books; travel thousands of miles." mean in Chinese?A．滚石不生苔 B．读数千本书就能行数千里路C．读万卷书，行万里路 D．读书百遍，其义自见3.Reading books can help people_________.A．understand the world betterB．get more sleepC．know little about themselvesD．get money from others4.What kind of books does the writer like?A．Comic books. B．Biography.C．Novels D．Story-books.5.Which of the following is NOT true?A．Books are helpful to us.B．Only reading books can make people succeed(成功).C．Young people should read more books.D．Chairman Mao likes reading very much.