问题 选择题

甲、乙二人同时从A地赶往B地.甲先骑自行车到中点后改为跑步,而乙则是先跑步,到中点后改为骑自行车,最后两人同时到达B地.又知甲骑自行车比乙骑自行车的速度快.并且二人骑车速度均比跑步速度快.若离开A地的距离x与所用时间t的函数关系用函数图象表示,则下列四个函数图象中,甲、乙二人的图象只可能是(  )

A.甲是①,乙是②

B.甲是①,乙是④

C.甲是③,乙是②

D.甲是③,乙是④

答案

甲先骑自行车到中点后改为跑步,知前半程的速度大于后半程的速度,则前半程的图线的斜率大于后半程图线的斜率.乙是先跑步,到中点后改为骑自行车,则前半程的图线的斜率小于后半程图线的斜率.因为甲骑自行车比乙骑自行车的速度快,则甲前半程的图线的斜率大于乙后半程图线的斜率.所以甲是①,乙是④.故B正确,A、C、D错误.

故选B.

阅读理解

阅读理解。

     Maurice Sendak's children's book, Where the Wild Things Are, published in 1963, has become

very successful throughout the years and was made into a movie earlier this year.

     The book's main character is a boy named Max who gets into trouble with his mother and is sent

to bed without any supper. Before long, Max's room magically becomes a forest, and he sails away

to a land where monsters(怪物,怪兽) live. Max isn't scared, though, and becomes king of the wild

things, but after a while, he begins feeling homesick. Max sails back home and his supper is still hot

when he arrives in his bedroom.

     Many teachers and professors like this story and use it to help children develop creativity and

imagination. Melina Davis, an education professor, said she likes how the book contains a couple

of pages that have only pictures on them. "This allows children to shape the story themselves," she

said.

     The book contains a few of larger words that some parents worry may confuse children, but

experts say those words help improve children's reading skills and challenge them.

     Davis said the book is well written which helps kids get involved in the story. "The book talks

about what all children go through, like 'I was naughty but my mommy still loves me'," Davis said.

The book also encourages children to face their fears. "I think it's really good to show that Max

makes friends with the monsters," Davis said. "Kids can find out monsters aren't always the thing

under the bed that's going to scare them. I think this is good because it shows that the children can

go to scary places but still have a positive experience."

     Since the book has been successful throughout the years, a movie was recently made and many

people are excited to see it. Davis said she thinks the movie will be wonderful but it might be a little

scary for younger children. "You don't want bad dreams over a book that's extremely wonderful,"

Davis said.

1. Teachers and professors like the book because it helps children ______.

A. understand pictures                      

B. improve reading skills

C. face their fear bravely                  

D. become more imaginative

2. Why does the book contain some larger words?

A. To make the story more formal.    

B. To help challenge the children's reading skills.

C. To encourage the children to learn more new words.          

D. To help children better understand the story.

3. Which of the following is TRUE according to the passage?

A. The character Max is brave enough in the story.        

B. Max was sent to the forest as punishment.

C. People of all ages are in favor of the book.            

D. The movie based on the book proves to be a great success.

4. What does Davis think of the movie?

A. She thinks children of all ages will love it.  

B. She encourages children to see it to fight against their fear.

C. She worries that it might be too frightening for some children.

D. She believes it will be a better choice for children than the book.

5. What's the author's purpose in writing the passage?

A. To advise parents to help children to improve their reading skills.        

B. To comment on a famous children's book.

C. To encourage children to face their fear and become more imaginative.        

D. To introduce a movie based on a children's book.

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