In statistics, the mathematical mean is obtained by dividing the sum of a group of scores by the number of scores.

A . The optimizer statistics are collected automatically. B . Only the timed operating system （OS） statistics and plan execution statistics are collected. C . The Oracle server dynamically generates the necessary statistics on tables as part of query optimization. D . The snapshots for the Automatic Workload Repository （AWR） are not generated automatically.  E . Snapshots cannot be collected manually by using DBMS_WORKLOAD_REPOSITORY PACKAGE.

A .  It updates the existing SQL profiles with current statistics B .  It makes the statistics information available to GATHER_STATS_JOB C .  It initiates the statistics collection process by running GATHER_STATS_JOB D .  It logs a warning message in the alert log so that the DBA can perform statistics collection manually

A . average row size B . last analyzed date C . size of table in bytes D . size of table in database blocks E . number of free blocks in the free list F . number of extents present in the table

A . CKPT B . SMON C . MMON D . DBWR

A . recovery catalog B . Oracle Enterprise Manager Repository C . Automatic Workload Repository （AWR） D . Oracle 10g Enterprise Manager Grid Control E . Automatic Database Diagnostic Monitor （ADDM）

A . The optimizer statistics are collected automatically. B . Only the timed operating system （OS） statistics and plan execution statistics are collected. C . The Oracle server dynamically generates the necessary statistics on tables as part of query optimization. D . The snapshots for the Automatic Workload Repository （AWR） are not generated automatically.  E . Snapshots cannot be collected manually by using DBMS_WORKLOAD_REPOSITORY PACKAGE.

A . The statistics are stored in the pending statistics table in the data dictionary. B . The statistics are treated as the current statistics by the optimizer for all sessions. C . The statistics are treated as the current statistics by the optimizer for the current sessions only. D . The statistics are temporary and used by the optimizer for all sessions until this session terminates.

A . Optimizer statistics are collected automatically. B . Only timed operating system （OS） statistics and plan execution statistics are collected. C . The snapshots for the Automatic Workload Repository （AWR） are not generated automatically. D . Snapshots cannot be collected manually by using the DBMS_WORKLOAD_REPOSITORY package. E . The Oracle server dynamically generates the necessary statistics on tables as part of query optimization.

A . Optimizer statistics are collected automatically. B . Only timed operating system （OS） statistics and plan execution statistics are collected. C . The snapshots for the Automatic Workload Repository （AWR） are not generated automatically. D . Snapshots cannot be collected manually by using the DBMS_WORKLOAD_REPOSITORY package. E . The Oracle server dynamically generates the necessary statistics on tables as part of query optimization.

A．many drunken drivers were not of legal age B．many young people were in no way qualified drivers C．raising the legal drinking age would have little effect on the reduction of tragedies D．raising the legal drinking age would reduce the fatalities caused by drunken drivers

Unemployment does not have the same dire consequences today as it did in the 1930's when most of the unemployed were primary breadwinners, when income and earnings were usually much closer to the margin of subsistence, and when there were no countervailing social programs for those failing in the labor market. Increasing affluence, the rise of families with more than one wage earner, the growing predominance of secondary earners among the unemployed, and improved social welfare protection have unquestionably mitigated the consequences of joblessness. Earnings and income data also overstate the dimensions of hardship. Among the millions with hourly earnings at or below the minimum wage level, the overwhelming majority are from multiple-earner, relatively affluent families. Most of those counted by the poverty statistics are elderly or handicapped or have family responsibilities which keep them out of the labor force, so the poverty statistics are by no means an accurate indicator of labor market pathologies. Yet there are also many ways our social statistics underestimate the degree of labor-market- related hardship. The unemployment counts exclude the millions of fully employed workers whose wages are so low that their families remain in poverty. Low wages and repeated or prolonged unemployment frequently interact to undermine the capacity for self-support. Since the number experiencing joblessness at some time during the year is several times the number unemployed in any month, those who suffer as a result of forced idleness can equal or exceed average annual unemployment, even though only a minority of the jobless in any month really suffer. For every person counted in the monthly unemployment tallies, there is another working part-time because of the inability to find full-time work, or else outside the labor force but wanting a job. Finally, income transfers in our country have always focused on the elderly, disabled, and dependent, neglecting the needs of the working poor, so that the dramatic expansion of cash and in-kind transfers does not necessarily mean that those failing in the labor market are adequately protected. As a result of such contradictory evidence, it is uncertain whether those suffering seriously as a result of thousands or the tens of millions, and, hence, whether high levels of joblessness can be tolerated or must be countered by job creation and economic stimulus. There is only one area of agreement in this debate--that the existing poverty, employment, and earnings statistics are inadequate for one of their primary applications, measuring the consequences of labor market problems. Which of the following is the principal topic of the passage？ ______ A．What causes labor market pathologies that result in suffering. B．Why income measures are imprecise in measuring degrees of poverty. C．Which of the currently used statistical procedures are the best for estimating the incidence of hardship that is due to unemployment. D．How social statistics give an unclear picture of the degree of hardship caused by tow wages and insufficient employment opportunities.

A) the growing number of smokers among young people B) the rising proportion of minorities in its population C) the increasing consumption of high-calorie foods D) the improving living standards of the poor people

A．replicate B．replication C．duplicate D．duplication

A．Y B．N C．NG

A．统计数字表明，按平均数计算，母亲受教育年限越长，她的家庭人口就越少。 B．统计数字表明，家庭平均人口的增长与母亲受教育的年限成反比。 C．统计数字表明，母亲受教育的时间越长，她的家庭就越大。 D．统计数字表明，母亲受教育的水平随着她的家庭人口的增多而增高。

Mainframe. computers helped greatly in the highly laborious task, which dates back to the Renaissance, of cataloging each reference of a particular word in a particular work. Concordances help scholars scrutinize important texts for patterns and meaning. Other humanities applications for computers in this early era of technology included compiling dictionaries, especially for forei8n or antiquated languages, and cataloging library collections. Such types of computer usage in the humanities may seem limited at first, but they have produced some interesting re suits in the last few years and promise to continue to do so. As computer use and access have grown, so has the number of digitized texts of classic literary works. The computer-hosed study of literary texts has established its own niche in academia. Donald Foster, an English professor at Vassar College in Poughkeepsie, New York, is one of the leaders in textual scholarship. In the late 1980s Foster created SHAXICON, a database that tracks all the "rare" words used by English playwright William Shakespeare. Each of these words appears in any individual Shakespeare play no more than 12 times. The words can then be cross-referenced with some 2,000 other poetic texts, allowing experienced researchers to explore when they were written, who wrote them, how the author was influenced by the works of other writers, and how the texts changed as they were reproduced over the centuries. In late 1995 Foster’s work attracted widespread notice when he claimed that Shakespeare was the anonymous author of an obscure 578-1ine poem, A Funeral Elegy (1612). Although experts had made similar claims for other works in the past, Foster gained the backing of a number of prominent scholars because of his computer-based approach. If Foster’s claim holds up to long-term judgment, the poem will be one of the few additions to the Shakespearean canon in the last 100 years. Foster’s work gained further public acclaim and validation when he was asked to help identify the anonymous author of the heat-selling political novel Primary Colors (1996). After using his computer program to compare the stylistic traits of various writers with those in the novel, Foster tabbed journalist Joe Klein as the author. Soon after, Klein admitted that he was the author. Foster was also employed as an expert in the case of the notorious Unabomber, a terrorist who published an anonymous manifesto in several major newspapers in 1995. Foster is just one scholar who has noted the coming of the digital age and what it means for traditional fields such as literature. "For traditional learning and humanistic scholarship to be preserved, it, too, must be digitized," he wrote in a scholarly paper. "The future success of literary scholarship depends on our ability to integrate those electronic texts with our ongoing work as scholars and teachers, and to exploit fully the advantages offered by the new medium." Foster noted that people can now study Shakespeare via Internet Shakespeare Editions, using the computer to compare alternate wordings in different versions and to consult editorial footnotes, literary criticism, stage history, explanatory graphics, video clips, theater reviews, and archival records. Novelist and literary journalist Gregory Feeley noted that "the simplest (and least radic A．computers have not been very helpful in humanities study until recently B．computers were widely used in all kinds of literary texts very long ago C．computers were invented by International Business Machines Corporation D．computers began to be used for literary study as soon as they were invented

在工程质量统计分析方法中，寻找影响质量主次因素的方法一般采用（） A、 Permutation graph method 排列图法 B、 Causal Analysis Graph 因果分析图法 C、 histogram method 直方图法 D、 Control Chart Method 控制图法

A、 Machine learning B、 Program language learning C、 Natural language learning D、 Statistical learning

A．accurate B．fixed C．dedicate D．rigid