某校师生为爱心基金捐款，已知第一天捐款4800元，第二天捐款6000元，第二天捐款人数比第一天多50人，且两天人均捐款数相等。问这两天共有多少人捐款？人均捐款额是多少？
解：设第一天捐款x人，则第二天捐款（x+50）人，
由题意列方程 
=
解得 x =200．
检验：当x =200时，x（x+50）≠0，
∴ x =200是原方程的解．
两天捐款人数x+（x+50）=450， 人均捐款
=24（元）．
答：两天共参加捐款的有450人，人均捐款24元．
| 根据短文内容，从下框的A-F选项中选出能概括每一段主题的最佳选项，选项中有一项为多余选项。 | |
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| Effective reading should adopt a correct way, and then you can get more by paying less. Here are some hints for reading effectively. 1_____ Don't choose a rather difficult book or a too easy one for yourself to read. A book full of new words will make you feel discouraged quickly. To understand those new words, you have to turn to the dictionary. A too easy one will only waste your time and cannot do any help. The two extremes may at last make you give up reading. So it's better for you to find a proper book with no more than five new words on each page. 2_____ If you come across a new word, do not look it up in a dictionary at once. Leave it alone and guess the meaning of it based on the content of the test. This ability is quite necessary in reading. If you know your guess is right later, you will be highly excited at your "success", and your interest in reading is well encouraged. If a word really prevents you from understanding the whole passage, turn to the dictionary by then. I am sure you can remember this word very well, as it has left you such a deep impression for its "troublesome image". 4_____ To comprehend what you are reading, you should think while you are reading, then form your own ideas. Your writing does not need to be quite formal but expressive. This practice can make you communicate with the original English authors. Day by day, your way of thinking in English will tum into a native way, which is quite important for English writing. 5_____ Language has its own beauty, no matter Chinese or English Don't merely take English as "test". Take it as an "entertainment" instead and you will enjoy it through learning. Maybe you should find some beautiful literary works such as a prose or a poem to read, if you like. Try to read them as loudly and impassionedly (充满激情 地) as you can. During this process, not only can you enjoy yourself by the great emotions of the writers, but also your pronunciation and youi manner of speaking English will be improved. 6_____ The last but not the least, keep on reading. If you cannot keep it as a habit, you will suffci from paying without gaining. |