题目

下列说法中正确的是( ) A.电荷在某处不受电场力作用,但该处电场强度不一定为零 B.一小段通电导体在某处不受安培力作用,则该处磁感应强度一定为零 C.当置于匀强磁场中的导体长度和电流大小一定时,那么导体所受的安培力大小也是一定的 D.在磁感应强度为B的匀强磁场中,长为L、电流为I的载流导体所受到的安培力的大小,介于零和BIL之间完形填空 阅读下面短文,从短文后所给各题的四个选项(A、B、C、D)中选出能填入空白处的最佳选项。 It is commonly believed that school is where people go to get education.  1    , it has been said that today children    2    their education to go to school. The   3    between schooling and education suggested by this is important. Education is    4   , compared with schooling. Education knows no    5   .It can take place    6   , whether in the shower or on the job, whether in a kitchen or on a tractor. It includes both the   7   learning that takes place in schools and the whole universe of learning out of class.  8    the experience of schooling can be known in advance, education quite often produces    9   . A chance talk with a    10    may lead to a person to discover how    11    he knows of another country. People obtain education from  12    on. Education,   13   ,is a very    14    and unlimited term. It is lifelong experience that starts long    15    the start of school, and one that should be a necessary part of one’s entire life. Schooling, on the other hand, is a    16    experience, whose style changes   17   from one way to the next. Throughout a country, children arrive at school at the same time, take   18 seats, use similar textbooks, do homework, and    19   ,and so on. Schooling has usually been   20    by the edges of the subjects being taught. 1.A.Then            B.However            C.Thus          D.Therefore 2.A.understand        B.need               C.enjoy         D.interrupt 3.A.difference         B.importance          C.use            D.problem 4.A.unexpected       B.endless            C.countless        D.simple 5.A.answers         B.ways             C.edges         D.meanings 6.A.anywhere         B.anywhere else        C.somewhere     D.somewhere else 7.A.part-time          B.public              C.standard       D.strict 8.A.If               B.Because           C.So                D.Though 9.A.pride            B.surprises           C.knowledge      D.progress 10.A.neighbor         B.friend              C.foreigner        D.teacher 11.A.wonderfully       B.well              C.greatly         D.little 12.A.babies           B.grown-ups         C.women           D.men 13.A.still             B.next              C.then           D.yet 14.A.long           B.broad              C.narrow         D.short 15.A.that            B.when              C.after          D.before 16.A.basic            B.strict             C.final           D.irregular 17.A.unusually        B.differently          C.little           D.frequently 18.A.large           B.new              C.fixed          D.small 19.A.take exams        B.hold exams          C.mark papers        D.read papers 20.A.changed          B.limited             C.chosen         D.controlled  
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