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Anthropologists have long speculated that early humans may have mated with Neanderthals, but the latest study provides the strongest evidence so far, suggesting that such encounters took place around 60,000 years ago in the Middle East.Small, pioneering groups of modern humans began to leave Africa 80,000 years ago and reached land occupied by the Neanderthals as they spread into Eurasia. The two may have lived alongside each other in small groups until the Neanderthals died out 30,000 years ago.Scientists led by Svantetook four years to sequence the whole Neanderthal genome from powdered bone fragments taken from three females who lived in Europe 40,000 years ago. To see how similar the Neanderthal was to modern humans, the team compared the ancient DNA with the genomes of five people from France, China, southern Africa, western Africa and Papua New Guinea. The study is the first to attempt a whole-genome comparison between Neanderthals and modern humans.The researchers found that modern humans and Neanderthals shared 99.7% of their DNA, which was inherited from a common ancestor 400,000 years ago. Further analysis revealed that Neanderthals were more closely related to modern humans who left Africa than to the descendants of those who stayed. Between 1% and 4% of the DNA in modern Europeans, Asians and those as far afield as Papua New Guinea, was inherited from Neanderthals."Those of us who live outside Africa carry a little Neanderthal in us," said Professor"Neanderthals probably mixed with early modern humans before Homo sapiens split into different groups in Europe and Asia. The comparison of these two genetic sequences enables us to find out where our genome differs from that of our closest relative."Interbreeding between humans and Neanderthals may nonetheless have been rare. Just two Neanderthal females in a group of around a hundred humans would have been enough to leave such a trace in our genome, provided that was the group that gave rise to all modern humans outside Africa.The study was greeted by scientists as almost certain confirmation that modern humans and Neanderthals mated when the groups crossed paths. "It certainly tells us something about human nature," said Chris Stringer, head of human origins at the Natural History Museum in London.Ed Green, a senior author on the study said: "How these peoples would have interacted culturally is not something we can speculate on in any meaningful way. But knowing that there was gene flow is important, and it is fascinating to think about how that may have happened."
A．find out the arrangement of Neanderthal genomeB．extract ancient Neanderthal"s DNAC．convince us early humans have mated with NeanderthalsD．prove the similarity in genome among modern humans
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对待患者知情同意权的作法中，错误的是（ ）。
A.对某些特殊急诊抢救视为例外 B.婴幼儿可以由监护人决定 C.家属知情同意是必须的 D.做到完全知情 E.做到有效同意
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在蒸汽透平转子的动叶流通内，蒸汽的动能和热能转换为机械能，并通过转子传递出去。
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医疗机构违反规定，涂改、伪造、隐匿、销毁病例资料的，对直接责任人员应（）。
A . 给予刑事处分
B . 给予行政处分
C . 吊销其执业证书
D . 给予开除处分
E . 罚款
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按统计法规定，设计的统计调查报表应当标明（）等标志。
A . 表号
B . 制表机关
C . 调查目的
D . 批准文号
E . 有效期限
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传输继电保护信息的光纤通道应满足通道误码率不大于（）
A.10-6B.10-7C.10-8D.10-9
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以下按钮操作需要激活司机室的是：（)。
A.受电弓升/降
B.蓄电池合/断
C.HB开/关
D.后备模式
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某零售商从批发商购进一种商品，其进货价格为10元/件，批零差率为30％，那么该商品销售价格为（）。
A.11
B.12
C.13
D.14
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加德纳认为要想理解儿童的艺术发展就需要理解生命过程中的三大系统，这三大系统是： （) 。
加德纳认为要想理解儿童的艺术发展就需要理解生命过程中的三大系统，这三大系统是： () 。
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考虑货币时间价值的影响下，现在一定量的货币或资金比将来等量货币或资金的价值( )。A、不确定B、
考虑货币时间价值的影响下，现在一定量的货币或资金比将来等量货币或资金的价值( )。 A、不确定 B、低 C、高 D、相等
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随疾病进展，COPD患者表现出哪些体征（）
A . 胸廓形态异常，包括胸部过度膨胀、前后径增大等
B . 呼吸变浅，频率增快
C . 呼吸困难加重时常采取前倾坐位
D . 低氧血症者可出现黏膜及皮肤紫绀
E . 两肺呼吸音减低，呼气相延长
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男性，32岁。右下肢发凉、麻木，间歇性跛行5个月，加重1个月，并出现静息痛。有烟酒嗜好。查体：右下肢发绀，皮温凉，右股动脉搏动可触及，腘动脉及足背动脉搏动未触及。目前患者的临床分期为（）.
A.第一期
B.第二期
C.第三期
D.第四期
E.第五期
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机械式汽油喷射系统的汽油喷射压力通常为（）MPa。
A.0.4～0.6
B.0.2～0.3
C.0.02～0.03
D.0.06～0.09
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影响材料预算价格变动的因素主要有（ ）。
A．市场供需变化
B．材料生产成本的变化
C．流通环节的多少
D．运输距离和运输方式的改变
E．政府有关政策的推行
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