已知向量a=e1-2e2,b=2e1+e2,c=6e1-2e2(e1,e2是不共

题型:解答题

问题:

已知向量
a
=
e1
-2
e2
b
=2
e1
+
e2
c
=6
e1
-2
e2
e1
e2
是不共线的向量),问
a
+
b
c
是否共线?证明你的结论.
考点:向量共线的充要条件及坐标表示
题型:解答题

六安市某乡镇八年级学生小东因厌学而辍学在家,老师和同学们多次劝说也不复学。他说:上不上学是我的权利,我想去就去,不想去就不去。请结合“公民的权利和义务”的相关内容对小东的言行进行辨析。

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PART THREE   READING COMPREHENSION (30%)

Directions: Read the following three passages.Each passage is followed by several questions or unfinished statements.For each of them there are four choices marked A, B, C, and D.Choose the one that fits best according to the information given in the passage

They say a cat has nine lives, and I think that possible since I am now living my third life and I’m not even a cat. My father died when I was 15, and we had a hard struggle to make a living. And my mother, who was seriously ill in her last years, died while still in her 60s. My sister married soon after, and I followed her example within the year.

This was when I began to enjoy my first life. I was very happy, in excellent health. I had a good job in San Jose and a beautiful home up the peninsula (半岛) in San Carlos. Life was a pleasant dream. Then the dream ended. I became afflicted (使苦恼) with a slowly progressive disease of the motor nerves, affecting first my right arm and leg, and then my other side. Thus began my second life...

In spite of my disease I still drove to and from work each day, with the aid of special equipment installed in my car. And I managed to keep my health and optimism (乐观), to a degree, because of 14 steps. Crazy? Not at all. Our home was an affair with 14 steps leading up from the garage to the kitchen door. Those steps were a standard measure of life. They were my yardstick, my challenge to continue living. I felt that if the day arrived when I was unable to lift one foot up one step and then drag the other painfully after it ---repeating the process 14 times, I would be through---I could then admit defeat and lie down and die.

Then on a dark night in August, 1971, I began my third life. It was raining when I started home that night; strong winds and slashing rain beat down on the car as I drove slowly down one of the less-traveled roads. Suddenly the steering wheel jerked (猝然一动). In the same instant I heard the bang of a blowout. It was impossible for me to change that tire! Utterly impossible!

I started the engine and thumped slowly along until I came to the dirt road, where I turned in and where I found lighted windows welcomed me to a house and pulled into the driveway and honked the horn.

The door opened and a little girl stood there. When she knew what happened to me, she went into the house and a moment later came out, followed by a man who called a cheerful greeting. I sat there comfortable and dry, and felt a bit sorry for the man and the little girl working so hard in the storm.

About an hour later, the man’s voice was heard, “This is a bad night for car trouble, but you’re all set now.” “Thanks,” I said. “How much do I owe you?” He shook his head, “Nothing. Cynthia told me you were a cripple. Glad to be of help. I know you’d do the same for me. There’s no charge, friend.” I held out a five-dollar bill, “No! I like to pay my way.” He made no effort to take it and the little girl stepped closer to the window and said quietly, “Grandpa can’t see it.”

56. “A cat has nine lives” here means ___________.

A. a cat can live nine times longer than any other animal  B .a cat can die ninth

C .a lucky man can not die easily                     D the writer will live nine times

57. What do you think of the man who helped change the tire?

A. Old, warm-hearted but pitiable             

B. Blind, but warm-hearted and happy

C. A blind old man that has nothing to do every day.

D. A poor old man that is always ready to help others.

58. How will the story be ended?

A. The writer paid the little girl but the old man did not accept.

B. The writer drove away with tears running down his cheek.

C. The writer stayed there, without knowing what to do and how to do it.

D. In the next few frozen seconds the writer felt the shame and astonishment he had never felt

before.

59. How do you understand the underlined sentence “I followed my sister’s example?”

A.  He listened to his sister carefully.

B  Mother told him that he must get the agreement from his sister for whatever he would do.

C  His sister got married. He, too.

D  His sister was a great woman.. He must learn from her.

60. The best title for this passage perhaps will be _____.

A.The Old Man and His Daughter              B. Heart Leaping Up

C.Never Lose Heart                        D. Good Will Be Rewarded Good

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俄国19世纪革命民主主义者车尔尼雪夫斯基从他关于()的论断出发,认为艺术是对生活的再现,是对客观现实的再现。

A、美是和谐

B、美是对立统一

C、美是生活

D、美是理念的感性显现

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友谊阿波罗的发展源动力的三大指导思想是?

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Word2000具有“所见即所得”的功能,即可以在打印机上以不同的字体和字号输出文档,也能在屏幕上显示出字型特征。( )

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