根据现阶段的推测，艾滋病现金比较公认的来源是（）动物。
A、灵长目
B、食肉目
C、啮齿目
D、单孔目
相关标签： 单孔目 灵长目
相关问题推荐
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根据现阶段的推测，艾滋病现金比较公认的来源是（）动物。
A、灵长目
B、食肉目
C、啮齿目
D、单孔目
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著名的邓巴数理论认为，人类智力许你拥有稳定社交人数最多为150人但这并不排除人类在社交生活中重新设定认知上限的可能性——人类已经傲到过这一点。与其他灵长目近亲相比，人类之所以能应付规模大得多的社交圈，原因在于数万年前人类发明了语言。狒狒通过轮流抓虱子的方式来巩固感情，而人类用修辞、八卦、演说、唱歌、讲故事和开玩笑等方式聚到一起。正是语言使得人类大脑的处理能力扩大到了150人。除非_____，否则我们的社交能力仍将保持在150人。
A.人类大脑处理信息的能力加速进化
B.网络化社交得到长足发展
C.彼此沟通的成本进一步降低
D.有像语言那样具有革命性意义的事物出现
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【单选题】鸭嘴兽是除（）之外为数不多的单孔目物种。
A、袋鼠
B、刺猬
C、针鼹
D、熊猫
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s="" environment="" from="" hot="" to="" cold,="" wet="" dry="" and="" back="" again="" over="" a="" time="" period="" stretching="" hundreds="" of="" millions="" years.Most importantly, scientists are beginning to realize that the climatic changes have had a major impact on the evolution of the human species. New research now suggests that climate shifts have played a key role in nearly every significant turning point in human evolution: from the dawn of primates (灵长目动物)some 65 million years ago to human ancestors rising up to walk on two legs, from the huge expansion of the human brain to the rise of agriculture. Indeed, the human history has not been merely touched by global climate change, some scientists argue, it has in some instances been driven by it.The new research has profound implications for the environmental summit in Rio. Among other things, the findings (demonstrate that dramatic climate change is nothing new for planet Earth. The benign (宜人的) global environment that has existed over the past 10,000 years——during which agriculture, writing, cities and most other features of civilization appeared—is a mere bright spot in a much larger pattern of widely varying climate over the ages. In fact, the pattern of climate change in the past reveals that Earth's climate will almost certainly go through dramatic changes in the future—even without the influence of human activity.1.Farming emerged as a survival strategy because man had been obliged .2.Earth scientists have come to understand that climate （ ）.3. Scientists believe that human evolution （ ）.4.Evidence of past climatic changes indicates that （ ）.5.The message the author wishes to convey in the passage is that（ ）.'>
When global warming finally came, it stuck with a vengeance. In some regions, temperatures rose several degrees in less than a century. Sea levels shot up nearly 400 feet, flooding coastal settlements and forcing people to migrate inland. Deserts spread throughout the world as vegetation shifted drastically in North America, Europe and Asia. After driving many of the animals around them to near extinction, people were forced to abandon their old way of life for a radically new survival strategy that resulted in widespread starvation and disease. The adaptation was farming: the global-warming crisis that gave rise to it happened more than 10,000 years ago.As environmentalists convene in Rio de Janeiro this week to ponder the global climate of the future, earth scientists are in the midst of a revolution in understanding how climate has changed in the past and how those changes have transformed human existence. Researchers have begun to piece together an illuminating picture of the powerful geological and astronomical forces that have combined to change the planet's environment from hot to cold, wet to dry and back again over a time period stretching back hundreds of millions of years.Most importantly, scientists are beginning to realize that the climatic changes have had a major impact on the evolution of the human species. New research now suggests that climate shifts have played a key role in nearly every significant turning point in human evolution: from the dawn of primates (灵长目动物)some 65 million years ago to human ancestors rising up to walk on two legs, from the huge expansion of the human brain to the rise of agriculture. Indeed, the human history has not been merely touched by global climate change, some scientists argue, it has in some instances been driven by it.The new research has profound implications for the environmental summit in Rio. Among other things, the findings (demonstrate that dramatic climate change is nothing new for planet Earth. The benign (宜人的) global environment that has existed over the past 10,000 years——during which agriculture, writing, cities and most other features of civilization appeared—is a mere bright spot in a much larger pattern of widely varying climate over the ages. In fact, the pattern of climate change in the past reveals that Earth's climate will almost certainly go through dramatic changes i
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When global warming finally came, it stuck with a vengeance. In some regions, temperatures rose several degrees in less than a century. Sea levels shot up nearly 400 feet, flooding coastal settlements and forcing people to migrate inland. Deserts spread throughout the world as vegetation shifted drastically in North America, Europe and Asia. After driving many of the animals around them to near extinction, people were forced to abandon their old way of life for a radically new survival strategy that resulted in widespread starvation and disease. The adaptation was farming: the global-warming crisis that gave rise to it happened more than 10,000 years ago.As environmentalists convene in Rio de Janeiro this week to ponder the global climate of the future, earth scientists are in the midst of a revolution in understanding how climate has changed in the past and how those changes have transformed human existence. Researchers have begun to piece together an illuminating picture of the powerful geological and astronomical forces that have combined to change the planet’s environment from hot to cold, wet to dry and back again over a time period stretching back hundreds of millions of years.Most importantly, scientists are beginning to realize that the climatic changes have had a major impact on the evolution of the human species. New research now suggests that climate shifts have played a key role in nearly every significant turning point in human evolution: from the dawn of primates （灵长目动物）some 65 million years ago to human ancestors rising up to walk on two legs, from the huge expansion of the human brain to the rise of agriculture. Indeed, the human history has not been merely touched by global climate change, some scientists argue, it has in some instances been driven by it.The new research has profound implications for the environmental summit in Rio. Among other things, the findings demonstrate that dramatic climate change is nothing new for planet Earth. The benign （宜人的）global environment that has existed over the past 10,000 years—during which agriculture, writing, cities and most other features of civilization appeared—is a mere bright spot in a much larger pattern of widely varying climate over the ages. In fact, the pattern of climate change in the past reveals that Earth’s climate will almost certainly go through dramatic changes in the future—even without the influence of human activity.
1. Farming emerged as a survival strategy because man had been obliged（ ）.2. Earth scientists have come to understand that climate（ ）.3. Scientists believe that human evolution（ ）.4. Evidence of past climatic changes indicates that（ ）.5. The message the author wishes to convey in the passage is that（ ）.
A.to give up his former way of life B.to leave the coastal areas C.to follow the ever-shifting vegetation D.to abandon his original settlement问题2： A.is going through a fundamental change B.has been getting warmer for 10,000 years C.will eventually change from hot to cold D.has gone through periodical changes问题3： A.has seldom been accompanied by climatic changes B.has exerted little influence on climatic changes C.has largely been affected by climatic changes D.had had a major impact on climatic changes问题4： A.human activities have accelerated changes of Earth’s environment B.Earth’s environment will remain mild despite human interference C.Earth’s climate is bound to change significantly in the future D.Earth’s climate is unlikely to undergo substantial changes in the future问题5： A.human civilization remains glorious though it is affected by climatic changes B.mankind is virtually helpless in the face of the dramatic changes of climate C.man has to limit his activities to slow down the global warming process D.human civilization will continue to develop in spite of the changes of nature