题目内容
The fiddler crab (蟹) is a living clock. It shows the time of day by the colour of its skin, which is dark by day and pale by night. The crab’s changing colour follows a regular twenty—four hour plan that exactly matches the daily rhythm of the sun.
Does the crab actually keep time, or does its skin simply answer to the sun’s rays, changing colour according to the amount of light strikes it? To find out, biologists kept crabs in a dark room for two months. Even without daylight, the crab’s skin colour continued to change exactly on time.
This characteristic probably developed gradually in answer to the daily rising and setting of the sun, to help protect the crab from sunlight and enemies. After millions of years it has become completely regulated (受控制) inside the living body of the crab.
The biologists noticed that once each day the colour of the fiddler crab is especially dark, and that each day this happens fifty minutes later than on the day before. From this they discovered that each crab follows not only the rhythm of the sun but also that of the tides (潮水). The crab’s period of greatest darkening is exactly the time of low tide on the beach where it was caught!
【小题1】The fiddler crab is like a clock because it changes colour ______.
A in a regular 24—hour rhythm B. in answer to the sun’s rays
C. at low tide D. every fifty minutes
【小题2】The crab’s changing colour ______.
A.tells the crab what time it is | B.protects the crab from the sunlight and enemies |
C.keeps the crab warm | D.is of no real use |
A.did not change colour | B.changed colour more quickly |
C.changed colour more slowly | D.changed colour on the same timetable |
A.in the process of evolution (进化) | B.over millions of years |
C.by the work of biologists | D.both A and B |
A.The Sun and the Tides | B.Discoveries in Biology |
C.A scientific Study | D.A Living Clock |
【小题1】A
【小题1】B
【小题1】D
【小题1】D
【小题1】D
解析
Rooster Morris is an author, entertainer, storyteller, musician, and composer. He has performed for over 4.5 million students in elementary schools, public libraries and museums. Rooster shares with the audience some of the stories in children’s books. Kids walk away from his performances, believing they can write, draw, perform, sing, or play a musical instrument. Most importantly, students walk away, believing reading will open the doors to every opportunity in life.
Everyone knows authors write books, but how many students actually have the opportunity to watch a published author read from their books? When a student has the advantage of meeting an author and has the opportunity to ask questions, they realize authors are people from far-away places. Rooster points out these misunderstandings and explains how he started writing.
Rooster talks of habits being one of the most important things in a person’s life. If people develop good habits, they will achieve their goals and be ready for anything. Rooster talks about how he wanted to play the fiddle(小提琴)when he was a young boy. He learns to make a habit of practicing the fundamentals. Rooster shows the kids the pay-off — he plays a song in front of the audience and brings the excitement to a new level.
Rooster will educate and entertain the audience. Many students begin writing after having seen Rooster’s program. When children hear someone they admire say, “You can do anything if you want to do it,” it motivates them into action.
Laid-Back West, Inc. has been booking authors for schools for over 13 years. We know the value of a successful author visit and can invite Rooster and other authors to visit your school.
【小题1】After attending Rooster Morris’ performances, kids _____.
A.are asked to write an article |
B.are able to play an instrument |
C.are well prepared to start school |
D.become more confident about themselves |
① Read books.
② Play an instrument.
③ Give out books.
④ Teach the audience how to draw.
⑤ Perform a play.
A.①② | B.①③ | C.③④ | D.②⑤ |
A.writing needs creativity |
B.forming good habits is important |
C.learning to play an instrument is not easy |
D.people should take action to achieve their goals |
A.sell Rooster Morris’ children’s books |
B.persuade kids to attend Rooster Morris’ school |
C.encourage children to write |
D.attract customers for Laid-Back West, Inc. |