题干

已知点M为某封闭图形边界上一定点,动点P从点M出发,沿其边界顺时针匀速运动一周.设点P运动的时间为x,线段MP的长为y.表示y与x的函数关系的图象大致如图所示,则该封闭图形可能是(  )

 

A:

B:

C:

D:

上一题 下一题 0.0难度 选择题 更新时间:2017-07-14 06:31:33

答案(点此获取答案解析)

A

同类题4

阅读下面材料,在空白处填入适当的内容(不多于3个单词)或括号内单词的正确形式。

    Alibaba founder, Jack Ma graduated from the Hangzhou Teacher's Institute in 1988 with a major in English language education, and went on to teach at another university in the city. He gave up____university teaching job after ____(discover)the Internet.

    Ma became excited ____the Internet during a visit to the United States in 1995 and wanted to find a way ____(bring )the online world to China. In 1999, he persuaded friends to give him $60,000 to start an e-commerce firm called Alibaba.

    Seeing an opportunity for small businesses to buy and sell their goods online, he started Alibaba, firstly running the company out of his apartment in the ____(east) city of Hangzhou. Alibaba Group includes Tmall.com for business-to-consumer trade and Taobao, China's____(popular )online consumer marketplace with hundreds of millions of products and services listed. Now the company is ____Internet giant and Ma—a former English teacher---is among China's most super-rich.

    On his long road to riches, Jack Ma says his____(inspire) has been the film character Forrest Gump.

     “I like that guy. I____(watch) that movie about 10 times,” he said in an interview with CNBC.

     “Every time I get frustrated, I watch that movie.”

Ma said the lesson he learned from the film featuring Tom Hanks was   ____“no matter what changes, you are you. I'm still the guy I was 15 years ago when I earned $20 a month.