题干

如图所示,    l1l2分别表示甲、乙两辆车所走路程S与时间t的关系,则他们的速度关系是(   )

A:甲比乙快

B:乙比甲快

C:甲、乙同速

D:无法确定

上一题 下一题 0.0难度 选择题 更新时间:2017-11-24 04:53:54

答案(点此获取答案解析)

A

同类题1

阅读下面材料,从A、B、C、D四个选项中选出一个最佳选项。

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    Brian was a funny student. He loved watching comedies(喜剧) best and hoped to become a comedy actor one day.

When he heard about the talent show to be held at this school, Brian decided to take part in. He had never acted on stage(舞台) before, and he was very excited. But some students laughed at him. “You are not funny but silly,” Ken, one of his classmates, said to his face. “No one will like what you do,” another boy also said to him, loudly.

Brian couldn't understand why they were so unkind to him. For a moment, he thought about giving up the show. But he remembered how much his friends liked his jokes, and also his teachers said he was very funny. So he decided to prepare for the show.

    Brian did a great job at the talent show. Everyone loved his performance, and he won the first prize! His teachers and friends were proud of him. Even so, Ken told Brian that he was not funny, and that he would never be successful. Brian didn't understand why Ken said so, but he realized that it had nothing to do with him. He confidently continued to work towards his goal.

   As the years went on, Brian met more people like Ken. “you'll do a terrible job,” they said to him. Luckily, most people encouraged him and some helped him to become even funnier. He got a lot of opportunities to perform in movies. He was even invited to appear on television. His fans thanked him because his comedies made them feel good when they were unhappy.

    Now Brian is a big comedy star! He is doing what he loves best. He never feels stressed like those unkind people, and he laughs all day long!