在Outlook Express中不能实现的操作有()。 A.自动加入联系人地址 B

题型:单项选择题

问题:

在Outlook Express中不能实现的操作有()。

A.自动加入联系人地址

B.定时收邮件

C.修改已发送邮件的主题

D.下载邮件后在服务器上备份

考点:计算机科学技术计算机基础计算机基础题库
题型:单项选择题

结余比率是客户一定时期内(通常为1年)结余和收入的比值,这里的收入是( )。

A.经常性收入

B.非经常性收入

C.税前收入

D.税后收入

题型:单项选择题

( )是指证券分析师应当诚实守信,高度珍惜证券分析师的职业信誉;在执业过程中应当坚持独立判断原则,不因上级、客户或其他投资者的不当要求而放弃自己的独立立场。

A.独立诚信原则
B.谨慎客观原则
C.勤勉尽职原则
D.公正公平原则

题型:单项选择题

稳定肢体

题型:单项选择题

Many people are concerned about the economic condition of developing countries — countries whose average per capita GNP is a fraction of that in more industrialized countries. However, for the developing countries, there exist many obstacles to their economic development.

One major obstacle to economic development is population growth. (46) The populations of most developing countries grow at a rate much faster than those of industrialized countries, and the population of some of them is so large that there is barely enough fertile land and other resources to support it. Many less developed countries depend extensively on agriculture, adding to the problem. In these countries, an incentive to have many children exists. (47) Most farms are worked by families, and children can work in the fields at an early age because most farmers believe that more children means more workers. In addition, having many children ensures the parents that someone will look after them in their old age.

Another problem for developing countries is increasing average life expectancy—the average remaining lifetime for persons who reach a certain age. Better education, international aid, and emphasis on health-care facilities help people live longer. A high life expectancy coupled with a high crude birthrate makes it difficult to increase per capita GNP.

Another obstacle to economic growth is limited natural resources. No country can develop beyond its resource potential. Unproductive land or a harsh climate can limit economic growth. (48) Some countries may be fortunate enough to discover a valuable mineral to finance their economic development, but most focus on agriculture and, as a result, their economic growth is hindered by the shortage of natural resources or energy sources needed for industry.

Still another obstacle to economic development is a lack of appropriate education and technology. Any developing countries do not have a highly literate population or the high level of technical skills needed to build an industrial society. In addition, most do not have money to train engineers and scientists. (49) Many developing countries cannot even afford to provide free public education for school-age children, and in those that can, not every child is able to take advantage of it because most of them have to work to help feed their families. As a result, much of the population may not have the basic skills needed to continue with higher education when it is offered.

Government also can be an obstacle to economic development. A country whose government often changes will have a hard time developing economically. Such constant changes impede long-term planning. (50) Economic development is made even more difficult if the political changes occur through violent revolution where industrial facilities may be destroyed.

(50) Economic development is made even more difficult if the political changes occur through violent revolution where industrial facilities may be destroyed.

题型:单项选择题

阅读下面文字,完成文后五题。
有科学家认为,由父母选择基因“组合”下一代的时代已快来临了。在“组合”未来的“非常婴儿”方面,父母们面对的是一道多项选择题,他们可以选择让婴儿能抵抗常见疾病和感染的基因,这样婴儿不会再害怕癌症、心脏病等;父母让孩子的个子长高一点、头发浓密一点也并非难事。
在美国的普林斯顿,科学家们成功地利用基因改善了老鼠的大脑功能,经过“加工”的老鼠比其他普通老鼠明显聪明得多。这种神奇的效果来自于从外界植入老鼠体内的一种基因,这种基因产生名为NR2B的化学物质。人脑当然比老鼠的大脑复杂得多,但它们的工作原理实际上是一样的。
至于说到为孩子选择人格与个性,其实也不是匪夷所思的,专家相信,个人个性的特点中至少有一半是由基因的特性决定的。
科学家打算将来自不同个体的基因:比如聪明一些的迟钝一些的,好看的和普通的,混合在一起进行研究,以便了解为什么人们会在力量、耐力、敏捷性等方面有差异。当这些主管天赋与性格的基因的奥秘解开之后,未来的父母就离“设计”自己的孩子又近了一步。但技术上的难题是,人为注入的基因大部分都是人体内自有的,因此如何确保这些外来基因能发挥作用,取代原有的基因是个关键。
有专家对基因工程能否如人们所认为的那样大步向前跃进持怀疑态度,因为在基因和染色体的世界里,随机性因素很多,基因一旦站错了队,不仅不能发挥出人们预先估计的作用,反而会给别的重要基因带来影响,甚至破坏它们。
要想给人的自然基因“升级”,只有通过“人造染色体”,可是人的染色体数目的标准是23对,加进人造染色体后,就必然引起染色体数量上的变化,如果未来人类还遵循有性繁殖规律的话,这些多出来的染色体还会传给下一代,这会带来什么后果多出来的染色体怎么办就是世界一流的科学家现在也无法对这些问题作出明确回答。

下面各句标点符号使用有误的一项是:

A.有科学家认为,由父母选择基因“组合”下一代的时代已快来临了。

B.科学家打算将来自不同个体的基因:比如聪明一些的迟钝一些的,好看的和普通的,混合在一起进行研究,以便了解为什么人们会在力量、耐力、敏捷性等方面有差异。

C.但技术上的难题是,人为注入的基因大部分都是人体内自有的,因此如何确保这些外来基因能发挥作用,取代原有的基因是个关键。

D.如果未来人类还遵循有性繁殖规律的话,这些多出来的染色体还会传给下一代,这会带来什么后果多出来的染色体怎么办就是世界一流的科学家现在也无法对这些问题作出明确回答。

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