从1、2、3、4中任取两个不同的数字构成一个两位数，则这个两位数大于20的概率为

胸椎片发现椎体均匀性压扁成片状，应怀疑（）

A.脊柱结核

B.强直性脊柱炎

C.椎间盘突出

D.椎管狭窄症

E.嗜酸性肉芽肿

古某，女，因犯贩卖毒品罪被判处死刑，但死刑执行书因故迟迟未下达。待到死刑执行之时，法医发现其于等候执行期间与看守她的狱警夏某通 * * ，现已有身孕。该案如何处理( )

A．不能执行死刑，因《刑法》规定死刑不适用于已怀孕的妇女。应立即停止执行并将情况上报

B．可以执行死刑，《刑法》规定死刑不适用于审判时怀孕的妇女，古某怀孕是在审判之后

C．可以执行死刑，只是要等到古某生产之后一定时间

D．可以执行死刑，因其是与狱警通 * * 而怀孕，其行为带有规避《刑法》的性质

银行结算账户是指银行为存款人开立的办理资金收付结算的活期存款账户和定期存款账户。

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.

对于改扩建项目的经济评价，以下表述中正确的是：（）

A.仅需要估算"有项目"、"无项目"、"增量"三种状态下的效益和费用

B.只对项目本身进行经济性评价，不考虑对既有企业的影响

C.财务分析一般只按项目一个层次进行财务分析

D.需要合理确定原有资产利用、停产损失和沉没成本