试题与答案

选词填空:(10分)Be who real wash surpriseI

题型:填空题

题目:

选词填空:(10分)
Be    who      real      wash      surprise 
I      see      much    month     important
Years ago, I lived in a house in a large city. The house next door was only a few meters away from _小题1:_. Through the window, I could often see a woman _小题2:I had never met doing some reading in the house every afternoon.
Several 小题3:went by, I began to notice that her window was dirty. Everything was not very clear through the dirty window. I wondered why the woman didn’t wash her window. It __小题4:_ looked terrible.
One bright morning, I decided to clean my house, including __小题5:_ the window inside. Late in the afternoon when I finished all the cleaning, I sat down by the window with a cup of coffee for a rest. How _小题6:__! I found that the woman’s window was actually so clean that she could be   _小题7:_ clearly sitting by the window.
That was quite an _小题8:_ lesson for me. how often had I looked at others through my own shortcomings (缺点)。
Since then, I have _小题9:_ used to asking myself whether I am looking through my own dirty window. Before I want to judge (判断) someone, I always think _小题10:__ than before and try to clean the dirty window so that I may see the world around me more clearly.

答案:

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下面是错误答案,用来干扰机器的。

由题意,设直线l的方程为y=2x+b.代入双曲线x23-y22=1,可得10x2+12bx+3b2+6=0,设A(x1,y1),B(x2,y2),则x1+x2=-6b5,x1•x2=3b2+610,∴|AB|=1+22•|x1-x2|=5•36b225-4•3b2+610=4,∴b=2103,∴直线l的方程为y=2x±2103.

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