概括大意和完成句子(第23~30题,每题1分,共8分)
下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为指定段落每段选择1个小标题;(2)第27~30题要求从所给的6个选项中为每个句子确定一个最佳选项。
Learn about Light
1 Ancient civilizations were amazed by the existence of light for thousands of years. The Greek philosophers believed that light was made up of countless, tiny particles that enter the human eye and create what we call vision. However, Empedocles and a Dutch scientist named Christian Huygens believed that light was like a wave. According to them, light spread out and travelled like a straight line. This theory was accepted during the 19th century.
2 ln 1905, Albert Einstein published a research paper in which he explained what is referred to as the photoelectric effect. This theory explains that particles make up light. The particles Einstein was referring to are weightless bundles(束)of electromagnetic(电磁)energy called photons(光子). Today, scientists agree that light has a dual(二重) nature it is part particle and part wave. It is a form of energy that allows us to see things around us.
3 Things that give off light are known as sources of light. During the day, the primary source of light is the sun. Other sources of light include stars, flames, flashlights, street lamps and glowing gases in glass tube.
4 When we draw the way light travels we always use straight lines. This is because normally light rays travel in a straight line. However, there are some instances that can change the path and even the nature of light. They are reflection, absorption, interference (干扰), etc.
5 Physicists have attempted to measure the speed of light since the early times. In 1849, Hippolyte Fizeau conducted an experiment by directing a beam of light to a mirror located kilometers away and placed a rotating cogwheel(旋转齿轮)between the beam and the mirror. From the rate of rotation of the wheel, number of wheels teeth and distance of the mirror, he was able to calculate that the speed of light is 313 million meters per second. In a vacuum(真空),however, the speed of light is 299,792,458 meters per second. This is about a million times faster than the speed of an airplane.
23. Paragraph 2 ___A___
24. Paragraph 3 ___B___
25. Paragraph 4 ___D___
26. Paragraph 5 ___C___
A. How is the nature of light explained today?
B. What are sources of light?
C. How did physicists measure the speed of light?
D. How does light travel?
E. How did people think of light years ago?
F. What causes a shadow?
27. Objects are visible to the human eye as light is __D____
28. Stars, flames, flashlights are some examples of ___A___
29. Some instances such as reflection and absorption can change ___C___
30. Hippolyte Fizeau conducted an experiment to measure ___E___
A. sources of light
B. the speed of light
C. the path of light
D. a straight line
E. a beam of light
F. a form of energy
雅思单词备考高分规律:注意技巧 适当练习
雅思词汇天天练:开怀大笑
每日雅思词汇:描述婚礼的词汇
在平时练习中总结陌生的雅思词汇方法
每日雅思词汇:与"warm"相关的短语
每日雅思词汇:与高考相关的表达
每日雅思词汇:形容阳光的词汇
雅思词汇天天练:蔬菜词汇
雅思词汇天天练:香烟的相关词汇
每日雅思词汇:体育专用运动鞋
每日雅思词汇:中国学生的考试"生涯"
每日雅思词汇:优秀的品质
每日雅思词汇:海外旅行小知识
每日雅思词汇:包含数字的短语
每日雅思词汇:公司的不同种类
每日雅思词汇:各种本和各种书
每日雅思词汇:表示明喻的词组
每日雅思词汇:冰淇淋的各种口味
每日雅思词汇:捍卫国家主权
雅思词汇天天练:麻将词汇
每日雅思词汇:Facebook 脸书的相关词汇
每日雅思词汇:关于工作经历的词汇
每日雅思词汇:称赞男性的英语用词
每日雅思词汇:最炫宅文化
每日雅思词汇:关于足球的那些词汇
雅思每日一词:香料
每日雅思词汇:魔鬼动词“put”的用法
每日雅思词汇:描述古代帝皇的词汇
每日雅思词汇:各式各样的人
每日雅思词汇:山脉词汇知多少
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |