一个运动电荷在某个空间里没有受到洛伦兹力的作用,那么[ ] A.这个空间一定没有

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问题:

一个运动电荷在某个空间里没有受到洛伦兹力的作用,那么[ ]

A.这个空间一定没有磁场

B.这个空间不一定没有磁场

C.这个空间可能有方向与运动方向平行的磁场

D.这个空间可能有方向与运动方向垂直的磁场

考点:磁场对运动电荷的作用:洛伦兹力、左手定则
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居民区噪声的卫生标准是多少?

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如果任意翻一下2010年的日历,翻出1月23日的概率为______.

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第二节完型填空(共20小题;每小题1.5分,满分30分)

阅读下面短文,掌握其大意,然后从36—55各题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

When I was in primary school, I got into a major argument with a boy in my class.I can’t 1 36

what the it was about, but I have never forgotten the   37   I learned that day.

I was   38   that I was right and he was wrong--and he was sure that I was wrong and he was right.The   39   decided to teach us a very important lesson.She   40   both of us up to the   41   of the class and   42   him on one side of her desk and me on   43  .In the middle of her desk was a large, round object.I could   44   see that it was black.She asked the boy what   45   the object was.“White,” he answered.

I couldn’t believe he said the object was white,   46   it was obviously black! Another   47   started between my classmate and me, this   48   about the color of the object.

The teacher told me to go stand where the boy was standing and told him to come stand where I had been.We changed   49  , and now she asked me what the color of the object was.I  50  answer, “White.” It was an object with two   51   colored sides, and from his side it was white.  52   from my side was it black.

My teacher taught me a very important lesson that day: You must   53   in the other person’s shoes and look at the   54   through their eyes in order to   55   understand their view.

36.A.think       B.suppose    C.remind     D.remember

37.A.lesson      B.lecture     C.class        D.text

38.A.told B.wished     C.convinced       D.allowed

39.A.officer     B.teacher     C.doctor      D.parent

40.A.told B.came       C.brought    D.woke

41.A.back        B.front        C.middle     D.side

42.A.planted    B.placed      C.had   D.fixed

43.A.the other B.another    C.other       D.others

44.A.happily    B.fortunately      C.clearly      D.nearly

45.A.width      B.shape       C.color       D.size

46.A.when       B.unless      C.until        D.if

47.A.fight        B.argument        C.conversation    D.game

48.A.time        B.year C.month      D.day

49.A.places       B.seats        C.attitudes    D.glasses

50.A.needed to        B.was able to      C.hoped to D.had to

51.A.similarly B.differently       C.beautifully      D.surprisingly

52.A.Still        B.Since       C.Only        D.Also

53.A.seat B.stand       C.lie    D.put

54.A.situation B.movement       C.condition        D.behaviour

55.A.unexpectedly   B.suddenly C.quietly     D.truly

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服务员在斟酒前,若发现陈年酒中有一定的沉积物,应先把这些沉积物剔除。这一服务程序叫__________。

题型:多选题

对于UML提供的一系列支持面向对象的分析与设计的图, (48) 给出系统的静态设计视图; (49) 对系统的行为进行组织和建模是非常重要的; (50) (51) 都是描述系统动态视图的交互图,其中 (52) 描述了以时间顺序组织的对象之间的交互活动, (53) 强调收发消息的对象的组织结构。

A.用例图

B.序列图

C.协作图

D.类图

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