题目

(本题满分10分) 学习投影后，小刚、小雯利用灯光下自己的影子长度来测量一路灯的高度。如图，在同一时间，身高为1.6m的小刚（AB）的影子BC长是3m，而小雯（EH）刚好在路灯灯泡的正下方点，并测得HB=6m．1.（1）请在图中画出形成影子的光线，并确定路灯灯泡所在的位置G；2.（2）求路灯灯泡的垂直高度GH；3.（3）如果小刚沿线段BH向小雯（点H）走去，当小明走到BH中点B1处时，求其影子B1C1的长。 If someone asks me, “Do you like music? ” I am sure 1 will answer him or her. “Of course, I do.” Because I think music is an important part of our lives.Different people have different ideas about music. For me, I like rock music because it’s so exciting. And my favourite rock band(摇滚乐队), the “Foxy Ladies” is one of the most famous rock bands in the world. I also like pop music. My classmate Li Lan loves dance music, because she enjoys dancing. My best friend, Jane, likes jazz music(爵士乐). She thinks jazz is really cool. “I like dance music and rock very much,” says my brother, “because they are amazing.” But my mother thinks rock is boring. “I like some relaxing(轻松的)music.” she says, that is why she likes country music(乡村音乐), I think.小题1: The writer likes music because he thinks ________. A．it’s an exciting part of our livesB．it’s an amazing part of our livesC．it’s an important part of our livesD．it’s an interesting part of our lives小题2:What kind of music does the writer like?A．Jazz and country music.B．Rock and dance music. C．Rock and pop music.D．Rock and country music.小题3:Who likes dancing?A．The writer.B．Li Lan. C．Jane.D．The writer’s mother.小题4:The writer’s mother thinks that country music is ________. A．amazingB．boringC．relaxingD．cool小题5:How many people’s ideas about music are talked about in this passage?A．4.B．5.C．6.D．7.