水在人体内的作用不包括（）A.有利体内生化反应 B.维持体温正常值 C.是许多有

电子政务安全目标是什么？

助理人员在对筹资活动和投资活动实施控制测试和实质性程序时，运用得当的有 ( )。

A．助理人员在审阅K公司投资资产的盘核报告时，发现K公司每年盘点方法恰当，盘核结果与会计记录相核对没有差异，助理人员认为K公司投资资产的内部控制得到了有效执行

B．根据“所有者权益=资产-负债”这一等式，助理人员已经对资产和负债进行了充分的审计，从审计效率方面考虑，助理人员无须对所有者权益进行审计

C．由于K公司长期投资的交易数量较少，每笔交易的金额较大，助理人员考虑到漏记或不恰当地对一笔业务进行会计处理，将会导致重大错误，从而对企业财务报表的公允反映产生较大的影响，所以助理人员决定对长期投资业务进行详细审计

D．K公司应付债券业务不多，助理人员没有对其内部控制进行测试，而是在了解其内部控制的基础上，直接进行实质性程序

北京市政府开展“市民对话一把手”活动，将本市的工作重点、工作目标及兑现改善民生的各项承诺要在本市电台与市民直接交流。四十位政府一把手在电台陆续与百姓共谋发展、共话民生。这一活动[ ]

①有利于公民依法充分行使监督权

②是我国人民当家作主的制度保障

③表明我国基层民主制度不断完善和发展

④有利于决策贯彻实施、增强公民的社会责任感

A、①④

B、②③

C、①②④

D、①③④

判断商标权的保护范围，一般采取的步骤和原则是（）。

A.判定被控商标侵权产品或服务与注册商标核定使用的产品和服务是否构成同类商品或服务

B.以核准注册的商标设计为准，确定商标的显著部分

C.将被控侵权商品或服务的商标和已核准注册商标的整体设计、视觉效果进行比较

D.对已核准注册的驰名商标的特殊规定

All modern human originated in sub-Saharan Africa, according to a new study boasted by its founders as the "final blow" against an opposing viewpoint. Not so fast, says one anthropologist who finds flaws in the evidence.

The new study, published in the July 19 issue of the journal Nature, delivers what the researchers say could be the final verdict in support of the single point "Out of Africa" theory.

Manica and colleagues took multiple measurements of more than 4,500 male fossil skulls from 105 populations around the globe. They combined the results with data from studies of global genetic variations in humans, finding that both genetic and skull variability decreased with distance from Africa. So populations in southeastern Africa held the highest variability compared with populations in other countries.

The results held even when the scientists accounted for climate, since climate conditions can lead to changes in skull features. " In very cold climates you tend to generate a slightly thicker brow ridge. Whether or not that’ s to keep horrible blizzards out of your eyes, I don’ t know, " Amos said.

Past studies based on skull morphology have been weak and have supported both of the humanorigin views.

In his own research, Hawks is funding that natural selection has led to changes in thousands of genes during only the past few thousand years.

"I’ m really thinking just the opposite of this paper, " Hawks said. "There are differences in the skull between populations, including their variability, but it is mostly due to very recent effects and not the origin of modern humans. "

"The muhiregional idea is identical to the recent African origin idea, except for its prediction that Europeans and Asians were part of the single population of origin and didn’t become extinct. "

[A] "Humans seem to have poured out of Africa, spread out across the world, but at a really quite uniform rate such that you get this lovely gradual loss of diversity," said study team member William Amos of the University of Cambridge.

[B] All modern humans originated from the same ancestors and they kept evolving as the society advances. Some species died out but others remained to live on the earth, which is still impossible to solve.

[C] At the end of the day, a resolution to the " Out of Africa" debate may be impossible, he said. Most of the evidence can be interpreted as supporting both human-origins theories. "It’ s really hard to find the two," Hawks said.

[D] This study " adds a p line of evidence to the Out of Africa (hypothesis) using such morphology," said paleontologist Will Harcourt-Smith of the American Museum of Natural History in New York. Harcourt-Smith was not involved in the current research.

[E] Debate over the origins of modern humans has simmered among anthropologists for years, with one theory asserting that Homo sapiens migrated across the world from a single point in Africa. The other theory states that multiple populations of Homo sapiens independently evolved from Homo erectus in regions beyond Africa.

[F] The recent study was funded by the Biotechnology and Biological Sciences Research Council. It has provided conclusive evidence concerning the actual process of human evolution.

[G] "We have combined our genetic data with new measurements of a large sample of skulls to show definitely that modern humans originated from a single area in sub-Saharan Africa," said lead researcher Andrea Manica of the University of Cambridge.

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