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When it comes to social behaviour，mammals are in a league of their own.Some birds may form pairs，or even cooperate to hunt，but the complexity (復雜性) of their relationships can hardly compare to those within a school of dolphins，a herd of elephants or a group of humans.What makes mammalian social groups different from a flock of starlings or a shoal of fish，is that in many cases the individuals could recognize each other.Although we may think that  all elephants look pretty much the same，we can easily tell individuals of our own species apart and it has become clear through studies that the same is true of other species.Dolphins have their own signature whistles that act like “names”，and elephants can recognize and greet other individuals they have known but not seen for many years.This is something that only a few species of birds appear to be able to do.
Mammals in complex social groups not only recognize each other as individuals，but also they remember a lot of information about that individual.Social groups often rely on this memory—such as knowing who is dominant to whom，who is related to whom，and who has done what to whom in the past.It’s like remembering who you have lent money to or done a favour for，and who hasn’t repaid that money or has talked about you behind your back.You have to learn who to trust，who your friends are，and who to watch out for.
All this remembering goes on in a particular part of the brain called the neocortex (大腦皮層)．If you compare the size of a mammal’s social group with the size of this part of the brain，you will find they are remarkably closely related.This area seems to take a long time to develop fully and animals in which it is very large take a very  long time to grow up to adulthood.During this time，the youngster has to learn all the rules of social behaviour in their group and to piece together all  the relationships between the group members：Knowledge that will be needed to avoid getting into trouble.
小題1:What is special about a mammalian social group according to the passage?
A．All the individuals cooperate to hunt.
B．The individuals can communicate with each other.
C．The individuals can recognize each other.
D．The individuals form closer relationship.
小題2:The passage suggests that elephants________.
A．are cleverer than dolphins
B．can recognize other species
C．may mistake a member for another
D．have good memories
小題3:Animals whose area of the neocortex is large________.
A．will have a long period of time before they become adults
B．will spend a shorter time learning the necessary knowledge
C．will learn the necessary knowledge much more easily
D．will have more difficulty in growing up as adults
小題4:If the neocortex is larger，the animals________.
A．can live a longer life
B．have a smaller social group
C．have a larger social group
D．have a greater body size

小題1:C
小題2:D
小題3:A
小題4:C

小題1:　C
解析　細節(jié)理解題。由文章第一段第三句可知，哺乳動物的一大特點是，一個群體中的每個個體都能辨認出其他的個體。
小題2:　D
解析　推理判斷題。文章第一段倒數(shù)第二句說明，大象如果彼此認識，即使它們多年不見，但重新見面后也能認出對方互相打招呼，這說明它們記憶力很好。
小題3:　A
解析　細節(jié)理解題。由文章最后一段第三句可知，如果一個動物的大腦皮層很大，那么它成年所需的時間也就更長。
小題4:　C
解析　推理判斷題。由文章最后一段可知，動物大腦皮層部位的大小與它群體的大小存在正相關的關系。故大腦皮層大，對應的社會群體也大。
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Mom was right！If you say thank you，for even the smallest gift or slightest show of kindness，you’ll feel happy.
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I’m not a reader or advocate of self­help books，but I am thankful for the reference I found in a newspaper article to the research Emmons was conducting on gratitude involving organ donors and recipients(接受者)．The chance discovery led me to this book.
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A．There are many ways of being thankful.
B．Gratitude is important to happiness.
C．Mom is great for her being thankful.
D．Being thankful will keep you fit.
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B．mom is as great a psychologist as Professor Emmons
C．Professor Emmons is a famous psychologist
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A．It is enough to thank others orally.
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科目：高中英語 來源：不詳 題型：完形填空

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A．seatsB．walls
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A．seeing B．taking
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小題5:
A．looking B．pacing
C．makingD．showing
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小題7:
A．bringing inB．putting down
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小題9:
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A．findingB．praying
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B．after he has explained his insights into happiness to everyone
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D．Those outer conditions affecting our happiness.
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A．Go jogging for happiness.
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C．Make sure that our minds are functioning normally.
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科目：高中英語 來源：不詳 題型：完形填空

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A．schoolB．study
C．bedD．work
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A．aroundB．until
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A．nightB．noon
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A．watchB．appreciate
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A．lastedB．rested
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A．hiredB．forced
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A．giveB．attend
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A．designedB．ruining
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A．looking intoB．looking out of
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A．recognizeB．conduct
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A．jobB．problem
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科目：高中英語 來源：不詳 題型：閱讀理解

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A．The ImperfectionistsB．A Visit from the Goon Squad
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A．Freedom by Jonathan Franzen
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A．Stacy Schiff is an archaeologist
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