Unit 5 Lesson 25 Let’s Do an Experiment!练习(含答案）冀教版九年级上册

Lesson 25　Let’s Do an Experiment! Ⅰ.根据句意及首字母或汉语提示写出单词 1.It’s not a s　　　　 method to test the result. 2.I have a friend c　　　　 Jenny.She is from Canada. 3.The 　　　　(力量) of nature is very strong.Nobody can prevent it. Ⅱ.根据汉语意思完成句子 1.你最好把瓶子装满水。 You’d better 　　　　the bottle 　　　　water. 2.外面很冷。请穿上你的大衣。 It’s very cold outside.Please 　　　　 　　　　your coat. 3.谁能快速把它倒过来 Who can 　　　　 　　　　 　　　　 　　　　quickly Ⅰ.完形填空【主题:人与社会　发明新型电源】 A 16-year-old boy named Li Tao lived in a small town in China.One day,while Li Tao was doing his science homework,he 　1　 a great idea.He worked out a way 　2　 a new type of power supply(供应) for his town,which had a problem with its electricity supply. To make his idea come true,Li Tao began to experiment at home.He believed that nothing could stop him from 　3　.He made and took apart many models.Even though he faced lots of 　4　 and failures,he didn’t give up.He corrected his mistakes,changed his plans,and kept working hard. 　5　 two years of hard work,he finally succeeded.He made a small device(设备) that could 　6　 change wind power into electrical power.This was a 　7　,environmentally-friendly way for his town’s power problem. News about Li Tao’s invention quickly spread around his school and town,and everyone really took pride 　8　 his achievement.The group of science-technology of the town decided to help him improve the invention.He was invited to give a speech to 　9　 other teenagers to learn more about science and be more creative in the Science and Technology Meeting. His story encourages teenagers that being young is not a barrier(阻碍) to achieve their dreams.Even a common teenager can do 　10　! 1.A.came about B.came across C.came up with D.came from 2.A.make B.to make C.take D.to take 3.A.finding B.inventing C.learning D.inviting 4.A.faults B.rocks C.challenges D.objects 5.A.After B.Before C.Until D.Though 6.A.succeed B.success C.successful D.successfully 7.A.new B.old C.natural D.unusual 8.A.at B.in C.with D.of 9.A.regret B.survey C.encourage D.produce 10.A.amazing anything B.anything amazing C.amazing something D.something amazing Ⅱ.阅读理解【主题:人与社会　天空颜色实验】 Colours from milk 　　In this experiment,a glass of water acts like the Earth’s atmosphere—the air that surrounds(围绕) us and the sky over our heads. 　　You’ll need 　　·Clear drinking glass 　　·Milk,any kind 　　·Small spoon 　　·Flashlight(手电筒) 　　1.Fill a glass halfway with water.In a darkened room,shine a flashlight on the glass from top,sides and all angles(角度). 　　Does the light change when it goes through the glass 　　2.Add 1/4 teaspoon of milk to water and stir(搅拌).Shine the flashlight on the glass from all angles again. 　　What do you see 　　What happens 　　The light looks blue when you look at the side of the glass. 　　That’s because the tiny particles(分子) of milk scatter(使分 ... ...