正确答案: C

丁、乙、甲、丙

题目：某国有甲、乙、丙、丁四个王子，已知甲、乙两位的领土面积总和与丙、丁两位的领土面积总和相等，甲、丁两位的领土面积总和比乙、丙两位的领土面积总和多，而乙的领土面积比甲、丙两位的领土面积总和还要多。由此可知，甲、乙、丙、丁四位的领土面积由多到少的顺序是( )。

解析：由题干可知：甲+乙=丙+丁，甲+丁>乙+丙，两个不等式相加可推出甲>丙；由此可推出丁>乙；又由题干中乙>甲+丙，可知乙>甲>丙，即丁>乙>甲>丙。故选择C项。

查看原题 查看所有试题

学习资料的答案和解析：

[单选题]15岁的刘某是某中学初三学生。不久前，他遭受了平生最大的"打击"。原来，班主任赵老师接连几次向刘某本人及其家长提出"建议"：针对孩子的成绩和家庭状况，最好尽早结束学业，或另寻其他职业技术学校。老师的做法违背了()的职业道德规范。

依法执教

解析：《中小学教师职业道德规范》（1997年修订）规定：教师要"依法执教"，不得侵犯学生合法权益。题干中，教师如果没有正当理由对采取停学、停课、赶出教室等做法，不让学生听课，就是剥夺学生的受教育权，违反了"依法执教"的职业道德。故选择D。

[单选题]教师的教学态度与学生的学习兴趣的关系调查，属于( )。

相关调查

解析：相关调查是指调查两种或两种以上教育现象之间是否存在相关关系，是否互为变量，目的是寻找某一教育现象的相关因素，以探索解决问题的办法。如教师的教学方式与学生的学习成绩的关系的调查，学生的学习兴趣与教师的教学态度的关系的调查等。

[单选题] Plants and animals that have been studied carefully seem to have built-in clocks.These biological clocks, as they are called, usually are not quite exact in measuring time.However, they work pretty well because they are "reset" each day, when the sun comes up. Do pigeons use their biological clocks to help them find directions from the sun?We can keep pigeons in a room lit only by lamps.And we can program the lighting to produce artificial "days", different from the day outside.After a while we have shifted their clocks.Now we take them far away from home and let them go on a sunny day.Most of them start out as if they know just which way to go, but choose a wrong direction.They have picked a direction that would be correct for the position of the sun and the time of day according to their shifted clocks. It is known and experimented that homing pigeons can tell directions by the sun.But what happens when the sky is darkly overcast by clouds and no one can see where the sun is?Then the pigeons still find their way home.The same experiment has been repeated many times on sunny days and the result was always the same.But on very overcast days clock-shifted pigeons are just as good as normal pigeons in starting out in the right directions.So it seems that pigeons also have some extra sense of direction to use when they cannot see the sun. Naturally, people have wondered whether pigeons might have a built-in compass-something that would tell them about the directions of the earth′s magnetic field.One way to test that idea would be to see if a pigeon′s sense of direction can be fooled by a magnet attached to its back. With a strong magnet close by, a compass can no longer tell direction. To test the idea, a group of ten pigeons had strong little magnet bars attached to their backs. Another group carried brass bars instead which were not magnetic.In a number of experiments, both groups were taken away from home and let go.On sunny days none of the magnet-pigeons was fooled.They were just as good as the brass-pigeons in starting out in the right direction toward home.On cloudy, overcast days, however, with no sun the brass-pigeons chose the right direction, but the magnet-pigeons were in trouble.They later started out in different directions and acted completely lost.

What can be inferred from the passage about biological clocks?

Pigeons′biological clocks are regulated every day with the sunrise.

解析：1.根据第一段中的"However，they work pretty well because they are"reset"each day，when the sun comes up."与第二段的实验可推知B项正确。 2.根据第二段中"And we can program the lighting to produce artificial"days"，different from the day outside.After a while we have shifted their clocks."可以得知D项正确。 3.根据文中研究太阳和地球磁场对鸽子生物钟影响的实验可知，二者都能帮助鸽子辨别方向。因此C项正确。 4.文章中以"Do pigeons use their biological clocks to help them find directions from the sun?"提出问题，然后通过实验来解答问题。即采用了提出问题一解答问题的模式，因此A项正确。 5.根据文章尾段的最后一个实验可知，在晴天的时候，两组鸽子都能准确辨别方向，因此鸽子在晴天是根据太阳辨别方向，跟磁场无关；在阴天时，背上无磁性铜棒的鸽子才能正确辨别方向，背上有磁棒的鸽子则不能，因此在阴天鸽子根据磁场辨别方向。综上可知，作者意在说明鸽子在不同的天气用不同的方法辨别方向。因此B项正确。

[单选题] Back in the old days, when I was a child, we sat around the family round table at dinner time and exchanged our daily experiences.It wasn′t very organized, but everyone was recognized and all the news that had to be told was told by each family member. We listened to each other and the interest was not put-on; it was real.Our family was a unit and we supported each other, and nurtured each other, and liked each other, and-we were even willing to admit-we loved each other. Today, the family round table has moved to the local fast-food restaurant and talk is not easy, much less encouraged. Grandma, who used to live upstairs, is now the voice on long distance, and the working parent is far too beaten down each day to spend evening relaxation time listening to the sandbox experience of an eager four-year-old. So family conversation is as extinct as my old toys and parental questions such as "What have you been doing, Bobby? " have been replaced by "I′m busy, go watch television." And watch TV they do; count them by the millions. But it′s usually not children′s television that children watch.Saturday morning, the children′s hour, amounts to only about 8 percent of their weekly viewing. Where are they to be found?Watching adult television, of course, from the Match Game in the morning, to the afternoon at General Hospital, from the muggings and battles on the evening news right through the family hour and past into Starsky and Hutch.That′s where you find our kids, over five million of them, at 10 p.m., not fewer than a million until after midnight! All of this is done with parental permission. Television, used well, can provide enriching experiences for our young people, but we must use it with some sense.When the carpet is clean, we turn off the vacuum cleaner.When the dishes are clean, the dishwasher turns itself off. Not so the television, which is on from the sun in the moming to the moon at night and beyond! Parents must exercise some control and show some concem about the cultural influence on the child when a program not intended for that child is viewed.Parents need to intervene. Nonintervention may be a wise policy in international affairs, but the results of parental nonintervention will not be wise at all.

The working parent is not willing to listen to her(his) four-year-old child talking about his sandbox games because she(he) is _________.

very tired

解析：1.由本文前两段的内容和一些词和短语如exchanged our daily expenences，a unit，supported，nurtured，liked，loved可知，在那些过往的日子里，作者一家人其乐融融，所以A项可以表达出这层意思，为正确答案。 2.根据第四段"the working parent is far too beaten down each day to spend evening relaxation time listening to the sandbox experience of an eager four-year-old"可知父母每天工作非常辛苦和疲惫，所以和孩子的交流沟通少了。所以正确答案为B。 3.从第五段到第八段可知，父母没有花费时间和精力陪孩子，让孩子看成人电视节目。从第八段最后一句"All of this is done with parental permission"可知，应该由他们的父母承担起这个责任。 4.由第九段可知我们的年轻人在看电视时要有自我的判断力，只有这样电视节目才能带给我们更多有益的信息。所以B项正确。 5.由最后一段的第二句"Parents must exercise some control and show some concern about the cultural influence on the child when a program not intended for that child is viewed."可知，C项正确。