问题 问答题

我们知道,电荷之间有力相互作用。为了研究这个问题,有人做了下面的实验:把两个带等量异种电荷的小球A、B固定于桌面上,在它们周围放置一些带子带正电的轻小物体,这些轻小物体,将受到A和B共同作用,下面的示意图(图)表示了这些轻小物体在A、B共同作用下的受力方向。 联系你学过的知识分析这幅图,发挥你的想像力,回答下列问题:

(1)这种研究方法与你学习哪个知识时用到的研究方法类似?

(2)提出一个有意义的猜想。

答案

(1)磁铁周围的磁场分布情况

(2)猜想:电流围存在磁场吗(带电体周围存在磁场)

填空题
完形填空
It was raining. I went into a café and asked for a coffee.     36   I was waiting for my drink, I realized that there were other people in the place, but I sensed     37   . I saw their bodies, but I couldn't feel their souls     38   their souls belonged to the        39   .
I stood up and walked between the tables. When I came to the biggest computer, I saw a thin, small man     40   in front of it. "I'm Steve", he finally answered after I asked him a couple of times what his name was. "I can't talk with you. I'm     41   ", he said. He was chatting online with somebody--probably someone he didn't know--and, at the same time, he was playing a computer game--a war game. I was surprised. He was chatting online and,     42   , he was playing a computer game—a war game. I was     43   .
Why didn't Steve want to talk with me? I tried     44    to speak to that computer geek (怪人),     45   not a word came out of his mouth. I touched his shoulder, but no reaction(反应). I was     46   . I put my hand in front of the monitor, and he started to shout, "    47   !"
I took a few steps back, wondering if all those people in the café were looking at me. I     ___48   , and saw nobody showed any interest.
    49   , I realized that the people there were having a nice conversation with their machines, not with people. They were more     50   having a relationship with the     ___51   , particularly Steve. I wouldn't want to     52    the future of human beings if they preferred sharing their lives with machines     53   with people.
I was worried and I sank in my thoughts. I didn't even     54   that the coffee was bad,  55  Steve didn't notice there was a person next to him.
小题1:
A.BeforeB.Since C.Although D.While
小题2:
A.pain B.loneliness C.sadness D.fear
小题3:
A.becauseB.when C.until D.unless
小题4:
A.home B.world C.NetD.Cafe
小题5:
A.sleepingB.laughing C.sitting D.learning
小题6:
A.busy B.thirsty C.tired D.sick
小题7:
A.first of allB.just thenC.at the same timeD.by that time
小题8:
A.surprisedB.delighted C.movedD.frightened
小题9:
A.once B.again C.first D.even
小题10:
A.but B.soC.if D.or
小题11:
A.excitedB.respectedC.afraid D.unhappy
小题12:
A.Shut upB.Enjoy yourselfC.Leave me aloneD.Help me out
小题13:
A.walked aboutB.walked out C.raised my handD.raised my head
小题14:
A.From then onB.At that momentC.In all D.Above all
小题15:
A.interested inB.tired ofC.careful aboutD.troubled by
小题16:
A.computer B.soul C.shopD.geek
小题17:
A.tell B.plan C.imagineD.design
小题18:
A.other thanB.instead ofC.except for D.as well as
小题19:
A.pretendB.understandC.insist D.realize
小题20:
A.as if B.just asC.just after D.even though