《2025年快乐过暑假江苏凤凰科学技术出版社七年级提优版》

5. 在一个各内角都相等的多边形中,每一个内角都比相邻外角的3倍还大$20^{\circ }$,求这个多边形的边数.

答案： 设这个多边形的一个外角的度数为 $ x^{\circ} $，则这个多边形的一个内角的度数为 $ (3x + 20)^{\circ} $。
由题意，得 $ x + (3x + 20) = 180 $，解得 $ x = 40 $，
即这个多边形的一个外角是 $ 40^{\circ} $。
$ 360^{\circ} ÷ 40^{\circ} = 9 $。
故这个多边形的边数是 9。

一 完形填空
Do you dream of growing up quickly so you can spend your own money? Earning(赚) money isn't just for people who grow up. Kids can do 1 too.
Earning gives you more than money. It's also a learning process. 2 working to earn your own money, you will learn 3 to succeed(成功) in the world. This includes using money, understanding and getting on with other people, using 4 you've learnt from textbooks and using your time cleverly.
Earning is 5 for you. Money gives you choices. 6 you want to buy a better birthday gift for your grandpa, the extra money you earn helps. 7 gives you independence(独立). When you earn your own money, you don't have to 8 anyone else to give you anything. 40 yuan that you earn yourself is 9 better than 160 yuan from your parents.
However, don't 10 to learn. Remember what you are studying now can make you be able to earn more money in later life.
(C)1. A. these B. them C. it D. they
(A)2. A. By B. With C. To D. On
(B)3. A. why B. how C. what D. which
(A)4. A. what B. why C. which D. where
(B)5. A. unnecessary B. good C. dangerous D. unimportant
(C)6. A. Though B. Unless C. If D. Although
(A)7. A. Money B. Gift C. Grandpa D. People
(A)8. A. depend on B. look up C. give up D. put on
(B)9. A. many B. much C. a lot of D. lot of
(A)10. A. forget B. accept C. wait D. hope

答案： 【文章大意】本文主要介绍了关于自己赚钱的一些好处。
1~5 CABAB 6~10 CAABA