更多“世界上没有两片完全相同的树叶。也没有完全相同的两个人。所以，”相关的问题
We all know that DNA has the ability to identify individuals but, because it is inherited, there are also regions of the DNA strand which can relate an individual to his or her family (immediate and extended), tribal group and even an entire population. Molecular Genealogy (宗谱学) can use this unique identification provided by the genetic markers to link people together into family trees. Pedigrees (家谱) based on such genetic markers can mean a breakthrough for family trees where information is incomplete or missing due to adoption, illegitimacy or lack of records. There are many communities and populations which have lost precious records due to tragic events such as the fire in the Irish courts during Civil War in 1921 or American slaves for whom many records were never kept in the first place. The main objective of the Molecular Genealogy Research Group is to build a database containing over 100,000 DNA samples from individuals all over the world. These individuals will have provided a pedigree chart of at least four generations and a small blood sample. Once the database has enough samples to represent the world genetic make-up, it will eventually help in solving many issues regarding genealogies that could not be done by relying only on traditional written records. Theoretically, any individual will someday be able to trace his or her family origins through this database. In the meantime, as the database is being created, molecular genealogy can already verify possible or suspected relationships between individuals. “For example, if two men sharing the same last name believe that they are related, but no written record proves this relationship, we can verify this possibility by collecting a sample of DNA from both and looking for common markers (in this case we can look primarily at the Y chromosome(染色体)),” explains Ugo A．Perego, a member of the BYU Molecular Genealogy research team.．
A．genetics has achieved a breakthroughB．genetic information contained in DNA can be revealed nowC．each individual carries a unique record of who he is and how he is related to othersD．we can use DNA to prove how distant an individual is to a family, a group or a population
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楚雄彝族自治州主要山脉有东部的乌蒙山、西南的哀牢山、西北的百草岭，形成三山鼎立之势。
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消费者对服装的需求根据年龄、性别等各有不同，据此，可以认定服装市场是（）
A.同质市场
B.异质市场
C.目标市场
D.消费市场
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离婚对当事人产生的法律后果有（）.
A . 夫妻身份关系的解除
B . 夫妻财产关系的变更
C . 夫妻扶养义务的解除
D . 父母子女关系的变更
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慢性肾功能不全少尿患者要严格控制液体入量，正确补液量为（）。
A.为前一日尿量加1000ml
B.为前一日尿量加800ml
C.为前一日尿量加500ml
D.为前一日尿量加300ml
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下列何种调理方式对于蔬菜的营养保存性最高（）。
A.生食
B.烤
C.炸
D.煮
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商业银行是依照《商业银行法》和《公司法》设立的（）等业务的企业法人。
A.吸收公众存款
B.发放贷款
C.进行企业投资
D.办理结算
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SAVR-2000励磁调节器将A(B)主通手动切换至B(A)主通运行操作步 骤
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下列关于政府采购的说法中，正确的有______
A.政府采购包括购买支出和转移支付两类
B.政府采购应当遵循公开透明原则
C.政府采购活动必须有专门的监管
D.政府采购合同应当采用书面形式
E.公开招标应作为政府采购的主要采购方式
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酶是一种生物催化剂,它具有作用专一性强,催化效率高等特点,能在常温或低浓度下催化复杂的生化反应。
A. 对B. 错
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对精度要求不高、工件刚度大、加工余量小、批量小的零件加工可（）加工阶段。
A.不必划分
B.分粗、精
C.分粗、半精
D.分粗、半精、精
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物流信息系统的功能模块越多越好，模块越多系统越复杂越不容易出错。（ ）
A.对 B.错
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有关FDDI，下列叙述错误的是（）
A.采用光纤作为传输介质 B.可以组建高速局域网 C.可以覆盖较大的范围，连接地理上分散的局域网 D.建网成本较低
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美国采取权力制衡的组织形式，其中立法权属于（）
A.最高检察院
B.国会
C.最高法院
D.总统
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