问题 选择题

2001年国家最高科学技术奖授予中科院院士王选,表彰他在激光排版上的重大科技贡献,激光是一种电磁波,某种排版系统中激光频率为5×1014 Hz,则该激光的波长落在电磁波谱中的哪一区域(    )

A.无线电波

B.红外线

C.可见光

D.紫外线

答案

答案:C

由题给信息可知激光是一种电磁波,则由电磁波v=λf可求出λ="600" nm,属于可见光的范畴,C项正确.

完形填空

Most parents, I suppose, have had the experience of reading a bedtime story to their children.And they must have 1 how difficult it is to write a 2 children's book.Either the author has aimed too 3 , so that the children can't follow what is in his (or  more often, her) story, 4 the story seems to be talking to the readers.

The best children's books are 5 very difficult nor very simple, and satisfy both the 6 who hears the story and the adult who 7 it.Unfortunately, there are in fact 8 books like this, 9 the problem of finding the right bedtime story is not 10 to solve.

This may be why many of books regarded as 11 of children's literature were in fact written for 12 .“Alice's Adventure in Wonderland”is perhaps the most 13 of this.

Children, left for themselves, often 14 the worst possible interest in literature.Just leave a child in bookshop o 15 and he will 16 willingly choose the books written in an imaginative way, or have a look at most children's comics, full of the stories and jokes which are the 17 of teachers and right-thinking parents.

Perhaps we parents should stop trying to brainwash childrensintos 18 our taste in literature.After all children and adults are so 19 that we parents should not expect that they will enjoy the 20 books.So I suppose we'll just have to compromise over that bedtime story.  

1.A.hoped      B.realized       C.told     D.said

2.A.short B.long     C.bad      D.good

3.A.easy        B.short    C.high     D.difficult

4.A.and   B.but      C.or D.so

5.A.both  B.neither C.either   D.very

6.A.child B.father   C.mother D.teacher.

7.A.hears B.buys    C.understands D.reads

8.A.few   B.many          C.a great deal of  D.a great number of

9.A.but   B.however      C.so D.because

10A.hard B.easy     C.enough D.fast

11.A.articles   B.work    C.arts      D.works

12.A.grown ups     B.girls     C.boys    D.children

13.A.difficult  B.hidden C.obvious       D.easy

14.A.are        B.show    C.find     D.add

15.A.school    B.home   C.office   D.library

16.A.more      B.less      C.able     D.be

17.A.lovingness     B.interests      C.objections    D.readings

18.A.receiving       B.accepting     C.having D.refusing

19.A.same      B.friendly       C.different      D.common

20.A.common B.avarage       C.different      D.Same

单项选择题