问答题Practice 2 Today monocultures have increased dramatically worldwide, mainly through the geographical expansion of land devoted to single crops and year-to-year production of the same crop species on the same land. Available data indicate that the amou
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参考答案和解析
现在,单一栽种模式已在全球范围内迅速发展,其途径主要是扩大种植单一作物的土地面积和在同一块土地上年复一年地种植同一种作物。现有数据显示,单位面积耕地上的作物种数已经减少,而且农田也趋向于合并。用大片土地栽种单一作物,导致这种趋势的有政治上和经济上的因素,其实这种栽种模式从规模经济收得了回报,而且在国家能够满足世界农业市场的需求方面作出了不小的贡献。
促使农业模式向单一栽种转变的技术因素有机械化,作物品种的改良,以及作物化肥和控制病虫害农药的研制。最近几十年的政府农产品政策也鼓励对这些技术的引入和利用。结果,现在的农场就趋少、趋大、趋向专业化和资本密集化。在区域范围内,增加单一栽种的农业比重也就意味着整个农业基础设施(例如科研、扩建、供应商、仓储、货运、市场等等)更为专业化。
更多“问答题Practice 2 Today monocultures have increased dramatically worldwide, mainly through the geographical expansion of land devoted to single crops and year-to-year production of the same crop species on the same land. Available data indicate that the amou”相关问题
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第1题：
When designing an expansion within the same data center, when is a pre－sales TDA absolutely required by IBM?()A. for a SAN768B Director
B. for a second TS3500 Tape Library
C. for a second EXP5060 Expansion Unit
D. for an additional DS8300 Expansion Frame
参考答案：A
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第2题：
In which three cases would you use the USING clause?()A.You want to create a nonequijoin.
B.The tables to be joined have multiple NULL columns.
C.The tables to be joined have columns of the same name and different data types.
D.The tables to be joined have columns with the same name and compatible data types.
E.You want to use a NATURAL join, but you want to restrict the number of columns in the join condition.
参考答案：C, D, E
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第3题：
In practice, it is usual for ship to be loaded _____ to improve the vessel’s movement through the water.
A.a little deeper aft
B.a little deeper forward
C.at the same draught between fore and aft
D.a balance between two sides
正确答案：A
实际上，通常装载的是尾部吃水深些一提升船舶对水移动的速度。 -
第4题：
In which stage of the Presentation-Practice-Production approach will students have the chance to use the new language freely and incorporate it into their existing language?A.Presentation stage
B.Practice stage
C.Production stage
D.Practice stage and Production stage答案：C解析：考查3P教学法。“3P教学法”也称“三位一体教学法”，是在交际语言教学模式影响下的产物。它把语言教学分成三个阶段：呈现(presentation)、操练(practice)、production(产出)。在新知呈现过程中，教师把要学习的新的语言知识介绍给学生，激发学生的求知欲。在语言操练阶段，教师要鼓励学生尽可能用刚刚学习的新知识进行练习。在语言产出阶段，学生被要求创造性地运用所学知识，做到灵活自由地运用语言，实现正确并流利地进行交际的目标。? -
第5题：
Linguistic forms having the same sense may have different references in different situations while linguistic forms with the same reference always have the same sense.
正确答案:错误 -
第6题：
A customer has a Fibre Channel switch residing in a configuration where both production and test data coexist. Which of the following is the simplest method for ensuring that the two types of data do not flow through the same port?（）
- A、VLAN
- B、zoning
- C、trunking
- D、LUN masking
正确答案:B -
第7题：
Attaching to a NAS storage system through redundant NICs will provide which of the following？（）
- A、High availability and failover
- B、File sharing on the storage system
- C、Better bandwidth through NIC Teaming on attached servers
- D、Greater number of LUNS available on the same storage system
正确答案:A -
第8题：
LPAR1 is configured to have the same 2 LUNs virtualized by a redundant pair of VIO servers. Which command will validate that both storage paths are available？（）
- A、Lspath
- B、sdd query adapter
- C、pcmpath query adapter
- D、datapath query device
正确答案:A -
第9题：
A machine’s ONLY external interface is configured with an address of 192.168.5.1 and a netmask of 255.255.255.0. No slots are available for expansion. Which of the following procedures should be performed to make it function as a gateway？（）
- A、Enable ipforwarding only
- B、Configure an alias on the same interface and enable ipforwarding
- C、Add a second interface into the same subnet and enable ipforwarding
- D、Add a second interface into a different subnet， and enable ipforwarding
正确答案:B -
第10题：
多选题Which two statements are true regarding the USING clause in table joins?（）AIt can be used to join a maximum of three tables
BIt can be used to restrict the number of columns used in a NATURAL join
CIt can be used to access data from tables through equijoins as well as nonequijoins
DIt can be used to join tables that have columns with the same name and compatible data types
正确答案： A,C解析： 暂无解析 -
第11题：
填空题Worldwide rainfall over land has increased by about one percent.____正确答案： D解析：
由题干中“Worldwide rainfall over land”定位至D段。本段提到，世界范围内的陆地降雨量增加了大约1%（increased by about one percent），故匹配段落为D段。 -
第12题：
问答题Practice 1 There is no great difference between city, suburb and village schools in the United States. Public schools teach the same subjects in the same grades across the land. Most school buildings look the same and have the same types of rooms inside. There is always a gym, a large room for basketball and other sports. There is a lunchroom, a school library, and an auditorium, a very large room where all the students and teachers can meet. Most schools also have rooms for the school band to practice in. They have rooms for students to type and use computers. There are usually workshops for students to work with paint, wood, metal, and other materials. These are all part of most American public schools, no matter where they are. Each school serves a neighborhood, and neighborhoods are different. In some, the parents take an interest in what their children are doing at school. They give their time, their ideas, and they may give gifts to their schools. That's what makes a good school in America. Generally, it doesn't matter whether the neighborhood is rich or poor, whether it is in the city, the suburbs, or the countryside. What matters is the interest the neighborhood takes in its school.正确答案： 【参考译文】
在美国,城里的学校、郊区的学校或农村的学校都差不多。在全国各地的公立学校,同一年级教同样的课程。大部分学校的建筑看上去也一样,里面房间的式样也没有多大差别。
学校里一般都有一个健身房,在里面可打篮球和做各种其他运动。此外,还有食堂、图书馆和礼堂;在礼堂里,可以举行全体师生大会。许多学校还有音乐教室,学校的乐队可在里面排练。另外还有电脑房,学生可在里面打字和使用电脑。一般学校还有工场间,学生可以学做油漆工、木工或金工等各种工艺活。不管在哪里,美国大部分公立学校都必须具备这些基础设施。
每个学校都服务于一个社区。当然,社区之间是有差别的。在有些社区,家长对孩子在学校里的活动比较关心,他们会为学校花点时间,提些建议,甚至还会送些礼物给学校。所有这些,都是美国好学校所必须具备的条件。一般来说,社区是否富有,学校是否在城里、郊区或乡下,这些都没有什么关系。重要的是,社区对学校是否关心。解析： 暂无解析 -
第13题：
A customer has a Fibre Channel switch residing in a configuration where both production and test data coexist. Which of the following is the simplest method for ensuring that the two types of data do not flow through the same port?（）
A.VLAN
B.zoning
C.trunking
D.LUN masking
参考答案：B
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第14题：
阅读以下说明和Java程序，将应填入(n)处的字句写在对应栏内。
[说明]
下面程序输出一个矩形面积，以及矩形区域上的假想的作物产量。
[Java程序]
public class MainJava {
public static void main(String[] args){
Lot_size small=new Lot_size();
Lot_size medium=new Lot_size();
small.set(5,5,5，25);
medium.set(10,10,10,50);
System.out.println("For a small lot of area"
+small.get_area()+"\n");
System.out.println("the actual crops are $"
+small.get_data2()+"\n");
System.out.println("and ideal crops are $"
+small.get data()+"\n");
System.out.println("For a medium lot of area"
+medium.get_area()+“\n”)；
System.out.println("the actual crops are $"
+medium.get_data2()+"\n");
System.out.println ("and ideal crops are $"
+medium.get_data()+"\n");
}
}
class Crop_assessment{
private int actual_crop;
private int ideal_crop;
public void set(int in_actual,int in ideal){
actual_crop=in_actual;
ideal_crop=in_ideal;
}
public int get_actual_crop(){return (1) ;}
public int get_ideal_crop()(return (2) ;}
}
class Lot_size{
private int length;
private int width;
private Crop_assessment crop= (3) ;
public void set(int 1,int W,int a,int i){
length=1;
width=W;
crop.set(a,i);
}
public int get_area(){return length*width;}
public int get_data()freturn (4) ;}
public int get_data2()(return (5) ;}
}
正确答案：(1) return actual_crop (2) return ideal_crop (3) new Crop_assessment() (4) crop.get_ideal_crop (5) crop.get_actual_crop()
(1) return actual_crop (2) return ideal_crop (3) new Crop_assessment() (4) crop.get_ideal_crop (5) crop.get_actual_crop() 解析：本题以Java语言为载体，考查面向对象程序设计中的几个重要概念—类的嵌套及函数的使用。
本题的功能是通过已定义的粮食收成类定义了一个计算特定矩形域上粮食收成的类，在主函数中定义了两个对象，并调用了相应的函数，来输出理想和实际的粮食产量。
首先，由于Crop assessment定义的成员数据缺省为私有的，所以想要获得实际和理想的粮食产量，要通过两个公有成员函数，所以(1)处应填入“return actual_crop”，(2)处应填入“return ideal_crop”。
其次，在类Lot size中，由于我们要反映矩形域上的粮食产量，所以我们在类中嵌套定义了一个类，Java中对象需要实例化，故(3)应填入“new Crop_assessment()”。
最后，由于我们想通过Lot_size类中的get_data和get_data2函数得到粮食产量，但由于这两个成员数据是私有函数，所以我们必须通过定义的对象调用它，所以(4)应填入“crop.get_ideal_crop()”，(5)应填入“crop.get_actual_crop()”。 -
第15题：
In which stage of the Presentation-Practice-Production approach will students have the chance to use the new language freely and incorporate it into their existing language?A.Presentation stage
B.Practice stage
C.Production stage
D.Practice stage and Production stage答案：C解析：考查3P教学法。“3P教学法”也称“三位一体教学法”，是在交际语言教学模式影响下的产物。它把语言教学分成三个阶段：呈现(presentation)、操练(practice)、production(产出)。在新知呈现过程中，教师把要学习的新的语言知识介绍给学生，激发学生的求知欲。在语言操练阶段，教师要鼓励学生尽可能用刚刚学习的新知识进行练习。在语言产出阶段，学生被要求创造性地运用所学知识，做到灵活自由地运用语言，实现正确并流利地进行交际的目标。 -
第16题：
共用题干
Genetically Modified Food
Ever since they were first put on the market in the early 1990s,genetically modified(GM，转基因）foods have been increasingly developed and marketed in many countries in the world, mainly on the basis of their promise to end the worldwide food crisis.______(46)Even if it would,is it the best solution?
Despite what it promises,GM technology actually has not increased the production potential （潜力）of any crop.______(47)For instance,a report that analyses nearly two decades of research on major GM food shows that GM engineering has failed to significantly increase US crop production.
______(48)While GM seeds are expensive,GM companies tell farmers that they will make good profits by saving money on pesticides（杀虫剂）.On the contrary, US government data show that GM crops in the US have produced an overall increase in pesticide use compared to traditional crops."The promise was that you could use less chemicals and boost production.But neither is true,"said Bill Christison,President of the US National Family Farm Coalition.
At the same time,the authors of the book World Hunger:Twelve Myths argue that there actually is more than enough food in the world and that the hunger crisis is not caused by production. ______(49)These indeed deserve our efforts and money. Meanwhile,the rise in food prices results from the increased use of crops for fuel rather than food shortage,according to a 2008 World Bank report.
______(50)Another World Bank report concluded that GM crops have little to offer to the challenges of worldwide poverty and hunger,because better ways out are available,among which "green"farming is supposed to be the first choice._______（49）
A:Problems come from food distribution and politics.
B:But can GM technology solve world hunger problems?
C:In fact,studies show that the most widely grown GM crop has suffered reduced productivity.
D:As a matter of fact,scientists see better ways to feed the world.
E:Something else,however,has been on the rise.
F: GM has many benefits when it was used at the beginning.答案：A解析：文章开篇第1段对转基因科技提出质疑，为下文具体论述做铺垫。因此答案为B。
第2段第一句提到转基因技术并没有增加粮食产量，后面举的例子是美国的粮食产量并没有增加。据此推测，空白处应该是粮食减产的有关语句。因此选C。
根据后文对转基因技术缺点的论述，第3段第一句应该为关于转基因缺点的总括句，分析各个选项后，E最符合题意。
通过对书的作者观点的引述得知，造成饥荒的原因不在生产领域。因此空格处应该解释饥荒的原因。选项A最符合题意，即问题出在食物分配和政策上。
最后一段的最后一句提出了解决饥饿问题的方法，因此选项D符合题意。 -
第17题：
Which two statements are true regarding the USING clause in table joins?（）
- A、It can be used to join a maximum of three tables
- B、It can be used to restrict the number of columns used in a NATURAL join
- C、It can be used to access data from tables through equijoins as well as nonequijoins
- D、It can be used to join tables that have columns with the same name and compatible data types
正确答案:B,D -
第18题：
A customer has 4 EXP5000 expansion enclosures attached to an IBM System Storage DS5100 intheir production environment， and the same configuration in their disaster recovery environment.The customer removes the drives from the production environment and ships them to the disasterrecovery facility. What IBM technology feature gives the customer the ability to migrate drives fromone DS5000 to another DS5000 with data intact？（）
- A、SnapCopy
- B、DACstore
- C、FlexClone
- D、RAID Protect
正确答案:B -
第19题：
A technician notices the storage space available on a data server is rapidly decreasing. A few users seem to be storing considerably more data than the other users. Which of the following should the technician implement to give all users the same amount of available storage space？（）
- A、Disk quotas
- B、Group memberships
- C、Logon scripts
- D、Shadow volumes
正确答案:A -
第20题：
When designing an expansion within the same data center, when is a pre-sales TDA absolutely required by IBM?（）
- A、for a SAN768B Director
- B、for a second TS3500 Tape Library
- C、for a second EXP5060 Expansion Unit
- D、for an additional DS8300 Expansion Frame
正确答案:A -
第21题：
Which two statements are true regarding the usage of the SQL*Loader utility（）
- A、You can load data into multiple tables during the same load session.
- B、You can load data from multiple files to a table during the same load session.
- C、You cannot perform selective data loading based on the values available in the records.
- D、You can use an export file generated by the EXPDP utility as an input data file to load the data.
- E、You can load data only if the input file is available on the disk and tape but not in a named pipes.
正确答案:A,B -
第22题：
问答题Practice 1 The agricultural sciences deal with the challenges of food and fiber production and processing. They include the technologies of soil cultivation, crop cultivation and harvesting, animal husbandry and the processing of plant and animal products for human consumption and use. As a result of the doubled yields of some economic crops, the farm output per hour of farm work increased almost 10-fold as capital was substituted for labor. New techniques of preserving food products made possible transportation over greater distances, in turn facilitating adjustments among locations of production and consumption, with further benefits to production efficiency.正确答案：
【参考译文】
农业科学研究的是粮食和纤维生产与加工所面临的挑战。农业科学包括耕作和耕种技术、畜牧业技术和动植物消费品加工技术。由于某些经济作物产量的成倍增长,并随着资本取代劳动,每小时农业生产的产值几乎增加了10倍。储存食品(粮食产品)的新技术使长途运输成为可能,这反过来又有助于产地与消费地之间的调整,使生产效率进一步提高。解析： 暂无解析 -
第23题：
单选题Which statement most accurately describes the difference between the two passages?APassage 1 deals less directly with the exportation of chimpanzees than does Passage 2.
BPassage 1 is less concerned with the interaction between man and the land than is Passage 2.
CPassage I pertains to a species in its indigenous habitat while Passage 2 addresses the same animal in nonnative settings.
DPassage I ends with an expression of optimism and Passage 2 does not.
EPassage I introduces a species and describes its status worldwide, while Passage 2 limits its discussion of that species to its activities in the Northern Hemisphere.
正确答案： A解析：
第一篇文章主要是关于黑猩猩在自然栖息地生存的情况。第二篇文章主要是关于黑猩猩在非自然栖息地生存的情况。故选C项。 -
第24题：
问答题Practice 2 Today monocultures have increased dramatically worldwide, mainly through the geographical expansion of land devoted to single crops and year-to-year production of the same crop species on the same land. Available data indicate that the amount of crop diversity per unit of arable land has decreased and that croplands have shown a tendency toward concentration. There are political and economic forces influencing the trend to devote large areas to monoculture, and in fact such systems are rewarded by economies of scale and contribute significantly to the ability of national agricultures to serve international markets. The technologies allowing the shift toward monoculture were mechanization, the improvement of crop varieties, and the development of agrochemicals to fertilize crops and control weeds and pests. Government commodity policies these past several decades encouraged the acceptance and utilization of these technologies. As a result, farms today are fewer, larger, more specialized and more capital-intensive. At the regional level, increases in monoculture farming meant that the whole agricultural support infrastructure (i.e. research, extension, suppliers, storage, transport, markets, etc.) has become more specialized.正确答案： 【参考译文】
现在,单一栽种模式已在全球范围内迅速发展,其途径主要是扩大种植单一作物的土地面积和在同一块土地上年复一年地种植同一种作物。现有数据显示,单位面积耕地上的作物种数已经减少,而且农田也趋向于合并。用大片土地栽种单一作物,导致这种趋势的有政治上和经济上的因素,其实这种栽种模式从规模经济收得了回报,而且在国家能够满足世界农业市场的需求方面作出了不小的贡献。
促使农业模式向单一栽种转变的技术因素有机械化,作物品种的改良,以及作物化肥和控制病虫害农药的研制。最近几十年的政府农产品政策也鼓励对这些技术的引入和利用。结果,现在的农场就趋少、趋大、趋向专业化和资本密集化。在区域范围内,增加单一栽种的农业比重也就意味着整个农业基础设施(例如科研、扩建、供应商、仓储、货运、市场等等)更为专业化。解析： 暂无解析