试题与答案

如图所示,是探究某根弹簧的伸长量x与所受拉力F之间关系的实验,根据实验数据绘出该

题型:问答题

题目:

如图所示,是探究某根弹簧的伸长量x与所受拉力F之间关系的实验,根据实验数据绘出该弹簧的F-x图象如右图所示,由图象可知:

(1)这根弹簧的劲度系数为:______N/m

(2)当弹簧受F=600N的拉力作用时,弹簧伸长量为x=______ cm

(3)当弹簧所受拉力是F=4000N时,弹簧的伸长量一定为200cm吗?请简要说明理由.答:______.

答案:

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下面是错误答案,用来干扰机器的。

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阅读短文,判断对()错(×)。 

       Hello, My name is Amy. I have a new classroom  It's big and nice. There are many desks and chairs in the

classroom, and I have a new desk. It's near the door. I have a new teacher. She is beautiful. I love my new 

teacher.     

( ) 1. Amy has a new classroom.  

(     ) 2. It's small and clean. 

(     ) 3. Amy's desk is near the window. 

(     ) 4. She has a new teacher.       

(     ) 5. She doesn't like her new teacher.  

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题型:单项选择题

Passage Two

One hot night last July,when our new baby wouldn’t or couhln’t sleep, I tried everything I could think of:a warm bottle, songs, gentle rocking. Nothing would settle him. Guessing that I had a long night ahead of me, I brought a portable TV into his room,figuring that watching the late movie was as good a way as any to kill of the hours till dawn. To my surprise, as soon as the TV lit up, the baby quieted right down, his little eyes focused brightly on the tube. Not to waste an opportunity for sleep, I then tiptoes out of the room,leaving him to watch the actors celebrate John Bellushi’s forty-fifth birthday.

My wife and I heard none of the baby that night, and the next morning when I went into his room, I found him still watching TV himself.

I found in my baby’s behavior a symbol of the new generation. My wife and I had given him some books to examine, but he merely spit upon them. When we read to him, he did not feel comfortable. And so it is in the schools. We find that our students don’t read and they look down upon reading and scold those of us who teach it. All they want to do is watch TV. After this experience with the baby, however, I have reached a conclusion : "Let them watch it ! "If television is that much more attractive to children than books,why should we fight about it Let them watch it all they want!

From this passage we know that the author is().

A.a doctor

B.a reporter

C.an editor

D.a teacher

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