题目内容
3.Suppose the year is 1666and we can see a student called Isaac Newton.He's away from his university for a holiday and at home with his family.Isaac Newton continues to study at home.He enjoys physics and thinking about the mysteries(神秘的事)of the world.On a day there is rain and sun at the same time,he sees a beautiful rainbow(彩虹) in the sky.It has many different colors,he is told that there are five.Newton wants to have his own rainbow because he wants to look at it closely.He decides to do an experiment.On a sunny day he goes inside a small room and makes the room very dark.Then he makes a small hole and the sun comes inside,it's a small ray of light.It is white.Newton takes a prism(三棱镜) and holds it up to the light.The ray of light goes through the prism,but it isn't white now-there are many colours.The prism has split up the white into different colours:Newton has a rainbow.
Newton looks at his rainbow carefully.He can see more than five colours,he can see seven.He says the colours are:red,orange,yellow,green,blue,indigo and violet.
But Newton is a scientist and he's always very interested in how things work.He has his rainbow but he wants to know more.So he takes another prism and holds it up to the rainbow in the same way.The rainbow goes through the second prism,but it isn't colourful now-it's white again.The prism has joined up the colours back into white light.Newton is the first person to understand that light is a combination(组合) of all the rainbow colours together.
57.In 1666Isaac Newton wasD.
A.a famous doctor
B.an assistant in a lab
C.a university teacher
D.a university student
58.In Chinese the words"ray of light"meansA.
A.光线
B.光圈
C.光速
D.灯光
59.The prism can split up the white intoC different colours.
A.less than five
B.five
C.seven
D.more than seven
60.PictureD is right according to Newton's experiment.
A.
B.
C.
D.
分析 本文介绍了牛顿所做的将太阳光分解成各单色光及将各单色光复合成白光的光学实验,太阳光通过三棱镜后,经过三棱镜的折射,被分解为红,橙,黄,绿,蓝,靛,紫七种单色光,而七色光经过三棱镜的再次折射后又变成了白色.由此他得出了一个结论:光是由七种颜色组合而成的.
解答 57:D 细节理解题 根据"Suppose the year is 1666 and we can see a student called Isaac Newton"可知,1666年的时候牛顿还是一个大学生.故答案为D
58:A 推理判断题 根据句意"Then he makes a small hole and the sun comes inside,it's a small ray of light.然后他弄了一个小洞,阳光通过小洞,那是_"推测,通过小洞射进来的一束光,叫做光线,故答案为A
59:C 细节理解题 根据"He can see more than five colours,he can see seven."可知,通过三棱镜的白光变成了七种单色光.故答案为C
60:D 推理判断题 根据"Newton takes a prism(三棱镜) and holds it up to the light"和"So he takes another prism and holds it up to the rainbow in the same way."可知,牛顿是把两面三棱镜以相同的方式对光进行了二次折射,故D选项符合实验,答案为D
点评 这道题涉及到两道推理判断题,做这样的题时并不能凭空猜测,要在文中找到相关依据,选出合适的选项.
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