试题与答案

如图,质量为m的小铁块A以水平速度V0冲上质量为M,长度为l,置于光滑水平面C上

题型:计算题

题目:

如图,质量为m的小铁块A以水平速度V0冲上质量为M,长度为l,置于光滑水平面C上的木板B,正好不从木块板上掉下,已知A、B间的动摩擦因数为u,此时长木板对地位移为S,求这一过程中:

(1)、木板增加的动能

(2)、小铁块减少的动能

(3)、系统机械能的减少量

(4)、系统产生的热量

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, B, C, D

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题型:阅读理解

Dear Daughter,

As we drove off from Columbia, I wanted to write a letter to you to tell you all that is on my mind.

First, I want to tell you how proud we are. Getting into Columbia is a real proof of what a great well-rounded student you are. You should be as proud of yourself as we are.

It is in college that you will discover what learning is about. This will be the period where you go from teacher-taught to master-inspired, after which you must become self-learner. So do take each subject seriously, and even if what you learn isn’t critical for your life, the learning skills you acquire will be something you will treasure forever.

Follow your passion in college. Take courses you think you will enjoy. Don’t be trapped by what others think or say, but make up your own mind.

Most importantly, make friends and be happy. Pick a few friends and become really close to them – pick the ones who are genuine to you. Don’t worry about their grades, looks, or even personalities.

Start planning early. I think your plan to study fashion is good, and you should decide where you want to be, and get onto the right courses.

Whether it is coursework planning or picking a major, you should take control of your life. I will always be there for you, but the time has come for you to be in the driver’s seat – this is your life, and you need to be in control. Being in control feels great.

So please treasure your college years – make the best of your free time, become an independent thinker in control of your destiny fate, learn and grow through your successes and challenges.

May your years at Columbia be the happiest of your life, and may you blossom into just what you dream to be.

Love,

Dad (& Mom)

65. According to the letter the author’s daughter is ______.

A. scared to be leaving home                                      B. a well-rounded student

C. the pride of her university                                       D. learning to drive a car

66. Which advice below is given to his daughter by the author?

A. Party with friends in her free time.

B. Ignore what others think or say.

C. choose friends with similar personalities.

D. Treasure and make the best of her college years.

67. From the passage, we can conclude the father is ______.

A. worried about his daughter                                    B. strict with his daughter

C. positive about his daughter’s future            D. sad about his daughter’s leaving home

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