题目内容
Why don’t birds get lost on their long migratory (迁居的) flights? Scientists have puzzled over this question for many years. Now they’re beginning to fill in the blanks.
Not long ago, experiments showed that birds rely on the sun to guide them during daylight hours. But what about birds that fly mainly by night? Tests with artificial stars have proved conclusively that certain night-flying birds are able to follow the stars in their long-distance flights.
One such bird, a warbler(鸣禽) , had spent its lifetime in a cage and had never flown under a natural sky. Yet it showed an inborn ability to use the stars for guidance. The bird’s cage was placed under an artificial star-filled sky at migration time. The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the direction of the make-be-live stars caused a change in the direction of his flight. Scientists think that warblers, when flying in daylight, use the sun for guidance. But the stars are apparently their main means of navigation (导航). What do they do when the stars are hidden by clouds? Apparently, they find their way by such landmarks as mountain ranges, coast lines, and river courses. But when it’s too dark to see these, the warblers circle helplessly, unable to get their direction.
【小题1】The reasons why birds don’t get lost on migratory flights__________.
A.have been known to scientists for many years |
B.are known by everyone |
C.have only recently been discovered |
D.will probably remain a mystery |
A.from North America to South America |
B.using what is apparently an inborn navigational ability |
C.only once during their lifetime |
D.when they are freed from their cages |
A.an artificial star | B.some landmarks |
C.their inborn ability | D.A and B |
A.discover workable answers to universal questions by studying particular cases(特别案例) |
B.jump to conclusions |
C.find a law and then investigate(调查) |
D.are disappointed by the habits of animals |
【小题1】C
【小题2】B
【小题3】B
【小题4】A
解析
The other day at a supermarket, I saw a naughty boy of about six crying loudly, falling to the floor and refusing to move. All the while the troubled mother was trying to persuade him to behave well but failed.A little smack on his bottom would have done the job,I thought.
Teenagers also cause discipline(纪律)problems.As a teacher, I had a 16-year-old student who had fallen in love with a waiter at a fast-food restaurant.In fact,she had left home to stay with him.So we decided to put her in the school hostel.She refused.When she heard her mother begging her to stay in the hostel she turned round and said:“Why don't you stay in the hostel if you like it so much?”
My palms were itching to slap her for being so rude but the poor mother continued to cajole her,hoping that gentle persuasion would work wonders.It did not.The last I heard,she had run away from home again.
The list goes on and on.Could it be that today's parents are softer and believe that they must not rod(棍棒惩罚)their children for fear of the bad result? Or do they actually believe that the children will get rid of the bad habits and behave well naturally as they grow older? I beg to disagree.I believe it is the parents' duty to discipline the children even at a young age.
My children who are now adults will prove the fact that I used the rod when I thought it necessary.Later when they went abroad,they related to their British university friends on how they were disciplined.Their friends abroad were filled with horror and told my daughter that I could be charged with child abuse(虐待).However,my daughter showed great respect for me when she told them that she would not be where she was today if not for my strict discipline.
【小题1】The underlined word“cajole”probably means .
A.persuade | B.scold | C.forgive | D.punish |
A.beat the children every day | B.treat the children in a softer way |
C.leave the children as they are | D.punish the children when necessary |
A.the naughty boy’s mother hit him |
B.the teacher’s daughter is living with the teacher |
C.the author’s daughter was thankful for the author’s strict discipline |
D.the author was charged with child abuse by her daughter’s friends abroad |
A.Spoil Kids | B.Value Discipline | C.Respect Parent | D.Protect Kids |