问题
解答题
学校图书馆科技书占图书总数的40%，故事书占图书总数的30%，故事书比科技书少1200本，科技书有多少本？
答案
1200÷（40%-30%），
=1200÷0.1，
=12000（本），
12000×40%=4800（本）；
答：科技书有4800本．
搜题请搜索小程序“爱下问搜题”
学校图书馆科技书占图书总数的40%，故事书占图书总数的30%，故事书比科技书少1200本，科技书有多少本？
1200÷（40%-30%），
=1200÷0.1，
=12000（本），
12000×40%=4800（本）；
答：科技书有4800本．
While reading a book in English, every few lines, you run across a word or two that you don't know. You look up every new word in the dictionary. Bad move. All that does is slow you down. Even electric or CD-ROM dictionaries can get in the way of your reading progress. A dictionary is like a road map. It can help you if you get lost and point you in the right direction. But if you stop to look at the "map" each time you take a step, you'll get nowhere fast. On your English learning "journey", a dictionary can be a helpful "travel companion"—if it's not overused. To help you start thinking in English, use an English-to-English dictionary. Otherwise, you'll always depend on your native language and end up translating in your head. A good dictionary can help you do more than just find the meaning of a word. It can help you verify (test and check) spelling, check word forms and grammar usage, find example sentences and learn pronunciation. Some dictionaries even provide exercises to teach you how to use their resources. Take time to get to know your dictionary. Learn the pronunciation symbols. Understand what the abbreviations(缩写  字) mean. Become familiar with the grammar codes that explain the usage for each word. Look for charts, diagrams and lists that might be useful in the future. You'll discover how rewarding it can be to make friends with your dictionary. And as they say, "A friend in need is a friend indeed".小题1: The underlined word "that" used in the last paragraph refers to ________.
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