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