问题 选择题

两质点甲和乙同时由同一地点沿同一方向做直线运动,其速度一时间图线如图所示,则下列论述正确的是(  )

A.2s前甲比乙运动得快

B.第3s末,甲落后于乙

C.在第2s内,甲的平均速度小于乙的平均速度

D.在第2s末,甲、乙两质点相距最远

答案

BCD

题目分析:速度图象描述的是物体的速度随时间的变化规律,斜率代表加速度、面积代表位移。

A、由图像可知,2s前甲的速度比乙的速度小;错误

B、根据图象规律可知,在第4s末两质点位移才相等,此时甲才追上乙,第3s末,甲落后于乙;正确

C、由图可知甲在第1s末的速度为2m/s,第2s末的速度为4m/s,甲在第2s内的平均速度为,而乙的速度一直是4m/s;正确

D、由图象可知,2s末A、B速度相等,此时应该相距最远;正确

故选BCD

点评:中等偏易。用图象法处理问题的优点:形象直观,清晰便捷,能非常直观地反映运动物体的速度随时间变化的情况,便于从整体上认识运动的特点.

阅读理解

What a miracle! A low-cost Lost in Thailand 《泰囧》has got the best ticket sales. It is true that Lost in Thailand has become the most popular Chinese film of all time.

The ticket sales

The movie Lost in Thailand cost just 30 million yuan to make, but it has earned more than 1.2 billion yuan. It has got more ticket than Painted Skin: The Resurrection, the best-selling movie this summer in China.

The story summary

Lost in Thailand is a comedy. It is a story about three Chinese men who met on their trips to Thailand. The movie has a great plot. Xu Lang is a businessman. He hurried to Thailand to look for his boss because of his special purpose. His competitor, Gao Bo followed him to Thailand, too. Xu Lang met Wang Bao, a pancake maker on his way to Thailand, Three Chinese men had some funny and unexpected experiences in Thailand and the story made people high.

The director and actors

The director of the movie is Xu Zheng. He has been a popular actor for about ten years. He was famous for his role, the Evil Pig in a popular TV serious. Lost in Thailand is his first movie that was directed by Xu Zheng. Xu Zheng is a lead role in the movie. Huang Bo and Wang Baoqiang are China’s top comedians and the both play the important roles in the movie.

根据短文内容,从题中所给的A、B、c、D四个选项中,选择最佳答案。(10分)

小题1:.Painted Skin: The Resurrection was mentioned because _______.

A.the two movies were filmed in Thailand

B.the two movie were directed by Xu Zheng

C.Lost in Thailand was more successful than it

D.Painted Skin: The Resurrection was such a success小题2:.Why did Xu Lang go to Thailand?

A.Because he wanted to find his boss.

B.Because he followed his competitor there.

C.Because he wanted to take a long vacation.

D.Because he wanted to stay away from his competitor.小题3:.The underlined word “unexpected” probably means “_______” in Chinese.

A.可以预知的

B.感到惊讶的

C.意料之中的

D.意想不到的小题4:.We can know the information of the movie EXCEPT ______.

A.its cost

B.its time limit

C.its director

D.its ticket sales小题5:.What’s the main idea of the passage?

A.It’s about why Lost in Thailand sells well.

B.It’s about the relationships between directors and actors.

C.It’s about the background of a popular Chinese comedy.

D.It’s about why Lost in Thailand is popular among visitors.

单项选择题