数据处理技术发展各阶段中，文件系统阶段与数据库系统阶段的主要区别之一是数据库系统具有

阅读《奇妙的克隆》一文的节选文字，完成小题。

克隆技术会给人类带来极大的好处,例如,英国PPL公司已培育出羊奶中含有治疗肺气肿的a-1抗胰蛋白酶的母羊。这种羊奶的售价是6千美元一升。一只母羊就好比一座制药厂,用什么办法能最有效、最方便地使这种羊扩大繁殖呢?最好的办法就是"克隆 "。同样，荷兰PHP 公牛，以色列LAS公司育成了能生产血清白蛋白的羊，这些高附加值的牲畜如何有效地繁殖？答案当然还是"克隆"。

母马配公驴可以得到杂种优势特别强的动物――骡，然而骡不能繁殖后代，那么，优良的骡如何扩大繁殖？最好的办法也是"克隆"，我国的大熊猫是国宝，但自然交配成功率低，因此己濒临绝种。如何挽救这类珍稀动物？克隆" 为人类提供了切实可行的途径。

除此之外，克隆动物对于研究癌生物学、研究免疫学、研究人的寿命等都具有不可低估的作用。 不可否认，"克隆绵羊"的问世也引起了许多人对"克隆人"的兴趣，例如，有人在考虑，是否可用自己的细胞克隆成一个胚胎，在其成形前就冰冻起来。在将来的某一天，自身的某个器官出了问题时，就可从胚胎中取出这个器官进行培养，然后替换自己病变的器官，这也就是用克隆法为人类自身提供"配件" 。

有关"克隆人"的讨论提醒人们，科技进步是一首悲喜交集的进行曲。科技越发展，对社会的渗透越广泛深入，就越有可能引起许多有关伦理、道德和法律等问题。

小题1:下面句子能够概括选文主要内容的一项是 (       )

A．克隆技术会给人类带来极大的好处。

B．克隆技术可以用来挽救珍稀动物。

C．克隆技术可以有效地繁殖具有高附加值的牲畜。

D．克隆技术对于人类疾病的防治、寿命的延长具有重要意义。小题2:下面对第一自然段中有关说明方法的判断及作用的分析，完全正确的一项是

A．用列数字的方法说明羊奶产量很高，药用价值很大。

B．用作比较的方法说明一只母羊比一座制药厂更重要。

C．用举例子的方法说明"克隆"能让高附加值的牲畜有效地繁殖。

D．用分类别的方法说明PHP公司、LAS公司都能培育高科技的牛羊。小题3:下面关于："克隆人"的说法不符合文意的一项是 （     ）

A．"克隆绵羊"的问世引起了许多人对"克隆人"的兴趣。

B．把人的细胞克隆成一个胚胎，可以为人类自身提供"配件" 。

C．"克隆人"有可能会带来许多有关伦理、道德和法律等问题。

D．"克隆人"的研究给人类带来无限的好处，其发展前景极为乐观。

从实体角度看，组织是为了实现某一特定目标，、经由分工与合作及不同层次的权利和责任制度而构成的人群集合系统，主要有三层含义，不包括( )。

A．组织必须有分工与协作

B．组织要有不同层次的权力与责任制度

C．组织必须要服从政府

D．组织必须具有目标

下列不是可持续农业做法的是（）。

A.农、林、牧、渔多种经营

B.大力植树造林，避免水土流失

C.大力开展生物防治，避免化学农药污染

D.大量使用化肥，保持农产品持续高产

患者，68岁。原有肺心病病史。受凉后发热伴咳浓痰，紫绀加重2天，次日神志模糊，嗜睡，血压130/95mmHg，无病理反射。

提示血气分析检查结果为：pH7.56，PaO₂55mmHg，PaCO₂70mmHg，HCO₃^-48mmol/L，BE+23mmol/L。应考虑为（）

A.呼吸性酸中毒+代谢性碱中毒

B.呼吸性碱中毒

C.呼吸性碱中毒+代谢性碱中毒

D.代谢性碱中毒

E.呼吸性酸中毒

F.呼吸性酸中毒+代谢性酸中毒

Low levels of literacy and numeracy have a damaging impact on almost every aspect of adults, according to a survey published yesterday, which offers (1) of a developing underclass. Tests and (2) with hundreds of people born in a week in 1958 graphically illustrated the (3) of educational underachievement. The effects can be seen in unemployment, family (4) , low incomes, depression and social inactivity.

Those who left school at 16 with poor basic skills had been employed for up to four years less than good readers (5) they reached 37. Professor John Bynner, of City University, who carried the research, said that today’s (6) teenagers would even encounter greater problems because the supply of (7) jobs had shrunk.

Almost one fifth of the 1,700 people interviewed for yesterday’s report had poor literacy and almost half (8) with innumeracy, a proportion (9) other surveys for the Basic Skills Agency. Some could not read a child’s book, and most found difficult (10) written instruction.

Poor readers were twice as likely to be a low wage and four times likely to live in a household where partners worked. Women in this (11) were five times as likely to be (12) depressed, (13) both tended to feel they had no control over their lives, and to trust others (14) .

Those who had low literacy and numeracy were seldom (15) in any community organization and less likely than others to (16) in a general election. There had been no (17) in the literary level of (18) reporting problems.

Alan Wells, the agency’s director, said: “ The results emphasize the dangers of developing an underclass people, who were out of work, (19) depressed and often labeled themselves as (20) . There is a circle of marginalization, with the dice against these people and their families.”

14（）

A.more

B.much

C.less

D.little