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  3. The selfishness of humans is a central assumption of orthodox(传统的)economics, where it is thought to lead to benefits for the eco

The selfishness of humans is a central assumption of orthodox(传统的)economics, where it is thought to lead to benefits for the eco

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问题     The selfishness of humans is a central assumption of orthodox(传统的)economics, where it is thought to lead to benefits for the economy as a whole. It is what the 18th-century Scottish economist Adam Smith described as the " invisible hand". But evolutionary biologists have come to see cooperation and selflessness as a big part of our【C1】______as a species. During the course of our evolution, they point out, cooperative groups【C2】______outcompeted groups of cheats.
    So we are inherently cooperative when operating within our own groups. We have also【C3】______social mechanisms to reinforce actions that benefit the group. "You could say teamwork at the scale of small groups is the signature【C4】______of our species," says evolutionary biologist David Sloan Wilson from Binghamton University in New York.
    But【C5】______teamwork can include a competition mechanism to promote actions that benefit the group, particularly in larger groups. It’s also important to remember that in-group cooperation evolved partly in response to competition between groups.
    This evolutionary perspective is radically new to economics, and it could be relevant to grand-scale economic problems that require solutions involving cooperation between nations. Take the challenge of getting nations to work together over economic solutions to climate change—a【C6】______focus in the runup to climate negotiations in Paris, France, later this year. This is a gargantuan(巨大的)problem from any perspective, but it is【C7】______an issue of coordination for the sake of the common good at a massive scale, says Wilson. "The challenge is therefore to【C8】______at larger scales the coordination and control that takes place more spontaneously at smaller scales," he says—from multicellular(多细胞的)organisms to village-sized groups of humans.
    "Morality evolved out of cooperation within and competition between groups, so when acting as a single group to tackle global problems we will have to【C9】______the role of natural selection ourselves," Wilson says. This might involve pursuing a wide variety of【C10】______, identifying those that work best, and then creating incentives to cooperate on implementation. "In some ways it’s the opposite of the invisible hand. "
A)adaptation
B)assume
C)compel
D)consistently
E)developed
F)effective
G)essentially
H)implement
I)particular
J)promptly
K)remarkable
L)rumor
M)strategies
N)success
O)suspicion
【C4】
选项
答案A
解析 空格位于句子的表语部分，后面为由介词of引出的短语，根据空格所在句子的位置可推断，空格中应填入名词作句子的表语，同时被名词signature修饰。本句引用了进化生物学家David Sloan Wilson的话，他认为小团体内的合作是人类这一物种适应性的标志性体现，故答案为A)adaptation“适应”。备选项中，L)rumor“谣传，传说”，M)strategies“策略，战略”和O)suspicion“怀疑，疑惑”这三个名词与上下文语义不符，故均排除。
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