题目

下列说法中正确的是（） A . 只要体积足够小，物体就可看成质点 B . 在单方向直线运动中，速度就是速率 C . 在单方向直线运动中，位移就是路程 D . 位移是矢量，路程是标量 答案：DIt feels like every time my mother and I start to have a conversation, it turns into an argument. We talk about something as simple as dinner plans and suddenly, my mother will push the conversation into the Third World War .She is always talking about my lack of a bright future because I don't plan to be a doctor. And much to her disappointment, I don't want to do any job related to science, either. In fact, when I was pushed to say that I planned to major(主修) in English and communications, she nearly had a heart attack."Why can't you be like my coworker's son?" she bemoans all the time. Her coworker's son received a four -year scholarship(奖学金) and is now earning 70,000 dollars a year as an engineer. I don't know what to say except that I simply can't be like Mr Perfect as I've called the unnamed coworker's son. I can't be like him. I'm the type of person who loves to help out in the community, write until the sun goes down, and most of all, wants to achieve a career because I love it, not because of fame (名声) or salary.I understand why my mother is worried about my future major. I've seen my mother struggle to raise me on her small salary and work long hours. She leaves the house around 6﹕30 am and usually comes home around 5 pm or even 6 pm. However, I want her to know that by becoming a doctor, it doesn't mean I'll be successful. I'd rather follow my dreams and create my own future.1.Which of the following topics do the writer and his mother often talk about?A. The writer's studies. B. Wars around the world.C. Dinner plans.D. The writer's future job.2.The underlined word " bemoans" in Paragraph 2 most probably means "________"．A. agrees. B. shouts. C. smiles. D. complains.3.Which of the following statements is probably TRUE about the writer?______.A. He wants to be like his mother's coworker's son.B. He wants to find a job in his community in the future.C. He wants to do something he really likes in the future.D. He doesn't think his mother's coworker's son is perfect4.We can know from the last paragraph that________.A. the writer's mother works very hard for the family.B. the writer doesn't know what his future will be like.C. the writer doesn't think being a doctor is a good job.D. the writer sometimes thinks his mother's advice is very good.