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Estimate the temperature required for an afterburner that will destroy 99.5% of the toluene containe

d in an airstream with a residence time of 0.5s using the values in Table below, Compare your results with the example calculation in Cooper and Alley, in which they show that three different methods of making this estimate lead to answers of 1326°, 1263°, and 1331° F
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更多“Estimate the temperature requi…”相关的问题
第1题
We_______thatitwilltakeanotherfourmonthstofinishthisplan.

A.grant

B.estimate

C.council

D.check

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第2题
According to the passage, unemployment rateA.by no means represents the actual unemploymen

According to the passage, unemployment rate

A.by no means represents the actual unemployment.

B.somewhat represents the relative health of the economy.

C.is usually 4 percent regardless of the relative health of the economy.

D.is an estimate of the percentage of people without a job.

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第3题
(c) In October 2004, Volcan commenced the development of a site in a valley of ‘outstandin

(c) In October 2004, Volcan commenced the development of a site in a valley of ‘outstanding natural beauty’ on

which to build a retail ‘megastore’ and warehouse in late 2005. Local government planning permission for the

development, which was received in April 2005, requires that three 100-year-old trees within the valley be

preserved and the surrounding valley be restored in 2006. Additions to property, plant and equipment during

the year include $4·4 million for the estimated cost of site restoration. This estimate includes a provision of

$0·4 million for the relocation of the 100-year-old trees.

In March 2005 the trees were chopped down to make way for a car park. A fine of $20,000 per tree was paid

to the local government in May 2005. (7 marks)

Required:

For each of the above issues:

(i) comment on the matters that you should consider; and

(ii) state the audit evidence that you should expect to find,

in undertaking your review of the audit working papers and financial statements of Volcan for the year ended

31 March 2005.

NOTE: The mark allocation is shown against each of the three issues.

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第4题
Forty May Be the New 30 As Scientists Redefine Age Is 40 really the new 30? In many way
s people today act younger than their parents did at the same age.

Scientists have defined a new age concept and believe it could explain why populations are aging, but at the same time seem to be getting younger.

Instead of measuring aging by how long people have lived, the scientists have factored in how many more years people can probably still look forward to.

"Using that measure, the average person can get younger in the sense that he or she can have even more years to live as time goes on," said Warren Sanderson of the University of New York in Stony Brook.

He and Sergei Scherbov of the Vienna lnstitute of Demography (人口统计学) at the Austrian (奥地利的) Academy of Sciences, have used their method to estimate how the proportion of elderly people in Germany, Japan and the United States will change in the future.

The average German was 39.9 years old in 2000 and could plan to live for another 39.2 years, according to research reported in the journal Nature on Wednesday.

However, by 2050 the average German will be 51.9 years old and will be expected to live another 37.1 years. So middle age in 2050 would occur at around 52 years instead of 40 years as in 2000.

"As people have more and more years to live they have to save more and plan more and they effectively are behaving as if they were younger," said Sanderson.

Five years ago, the average American was 35.3 years old and could plan for 43.5 more years of life. By 2050, the researchers estimate it will increase to 41.7 years and 45.8 future years.

"A lot of our ski/Is, our education, our savings and the way we dear with our health care depend a great deal on how many years we have to live," said Sanderson.

This dimension of how many years people have to live has been completely ignored in the discussion of aging so far.

第36题:People 40 years of age today seem to be as young as

A.their parents were at the same age.

B.their parents were at the age of 30.

C.their children will be at the same age.

D.their children will be at the age of 30.

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第5题
听力原文:Outrageous shopping bills are a familiar nightmare for many compulsive shoppers.
And contrary to popular opinion, men suffer that nightmare nearly as often as women. A new survey finds that both genders are almost equally likely to suffer compulsive buying disorder, a condition marked by uncontrollable, unnecessary and unaffordable shopping sprees. Researchers used to estimate that between 2 and 16 percent of the US population suffered compulsive buying disorder, and that 90 percent of sufferers were female. But a 2004 telephone survey of more than 2,500 American adults found that 6 percent of women and about 5.5 percent of men are compulsive shoppers; that's more than 1 in 20 adults. The sexes do not shop at the same aisles though. Experts say that women are more likely to binge-buy things like clothes or gifts for other people while men tend to buy expensive electronics. This survey is the first to find such a high number of compulsive shoppers in the general population. Study authors hope that this finding can convince doctors of how many people are hurt by the disorder, so they can make finding a cure a priority.

How many people of US population suffered compulsive buying disorder?

A.2 to 60 percent.

B.2 to 16 percent.

C.20 to 60 percent.

D.16 to 20 percent.

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第6题
What is the 'biggest city in the world? That is,【21】city has the largest population? This
seems like【22】question to answer, but actually it isn't.

It's actually rather difficult to say which cities【23】the largest. There are two reasons for this difficulty. First of all, it isn't easy to determine a city's boundaries, that is, where a city ends. Nowadays, nearly all cities have a large【24】area around them. So when we talk about the population of a city, we often mean the population of the whole metropolitan area around the city. That means that it's difficult to determine what the population of a city is because it's difficult to define what a city is.

The second reason that it is difficult to【25】the population of different cities is this: it is almost impossible to get【26】about the population of all cities for the same year. For example, we might get an estimate of New York's population in 1979 and an【27】of Mexico City's population in 1981. So we real ly can't compare the numbers because the information is for【28】different years. And the population of cities changes rather quickly, especially in some cases. For example, the population of Jakarta, Indonesia, may increase by 5% each year, so the population figure will change rather quickly.

So we can say that these are our two【29】for comparing the populations of cities: one, it's difficult to determine the【30】of a city, and two, it is difficult to get accurate information.

(46)

A.what

B.which

C.where

D.how

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第7题
There were two widely divergent influences on the early development of statistical methods
. Statistics had a mother who was dedicated to keeping orderly records of governmental units (state and statistics come from the same Latin root, status) and a gentlemanly gambling father who relied on mathematics to increase his skill at playing the odds in games of chance. The influence of the mother on the offspring, statistics, is represented by counting, measuring, describing, tabulating, ordering, and the taking of censuses—all of which led to modem descriptive statistics. From the influence of the father came modem inferentical statistics, which is based squarely on theories of probability.

Descriptive statistics involves tabulating, depicting, and describing collections of data. These data may be either quantitative, such as measures of height, intelligence, or grade level—variables that are characterized by an underlying continuum or the data may represent qualitative variable, such as sex, college major, or personality type.

Large masses of data must generally undergo a process of summarization or reduction before they are comprehensible. Descriptive statistics is tool for describing or summarizing or reducing to comprehensible form. the properties of an otherwise unwieldy mass of data.

Inferential statistics is a formalized body of methods for solving another class of problems that present great difficulties for the unaided human mind. This general class of problems characteristically involves attempts to make predictions using a sample of observations. For example, a school superintendent wishes to determine the proportion of children in a large school system who come to school without breakfast, have been vaccinated for flu, or whatever. Having a little knowledge of statistics, the superintendent would know that it is unnecessary and inefficient to question each child; the proportion for the entire district could be estimated fairly accurately from a sample of as few as 100 children. Thus, the purpose of inferential statistics is to predict or estimate characteristics of a population from knowledge of the characteristics of only a sample of the population.

Which of the following are counting and describing associated with?

A.Descriptive statistics

B.Unknown variables

C.Qualitative changes

D.Inferential statistics

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第8题
Investment in the public sector, such as electricity, irrigation, public services and tran
sport (excluding vehicles, ships and planes) increased by about 10%, although the emphasis moved to the transport and away from the other sectors mentioned. Trade and services recorded a 16% to 17% investment growth, including a 30% increase in investment in business premises. Industrial investment is estimate to have risen by 8%. Although the share of agriculture in total gross investment in the economy continued to decline, investment grew by 9% in absolute terms, largely spurred on by a 23% expansion of investment in agricultural equipment. Housing construction had 12% more invested in it in 1964, not so much owing to increased demand, as to fears of new taxes and limitation of building.

Total consumption in real terms rose by close on 11% during 1964, and per capital personal consumption by under 7%, as in 1963. The undesirable trend towards a rapid rise in consumption, evident in previous years, remained unaltered. Since at current prices consumption rose by 16% and disposable income by 13%, there was evidently a fall in the rate of saving in the private sector of the economy. Once again consumption patterns indicated a swift advance in the standard of living. Expenditure on food declined in significance, although consumption of fruit increased. Spending on furniture and household equipment, health, education and recreation continued to increase. The greatest proof of altered living standards was the rapid expansion of expenditure on transport (including private cars) and personal services of all kinds, which occurred during 1964. The progressive wealth of large sectors of the public was demonstrated by the changing composition of durable goods purchased. Saturation(饱和) point was rapidly being approached for items such as the first household radio, gas cookers, and electric refrigerators, whereas increasing purchases of automobiles and television sets Were registered.

The author thinks that the trend towards a rapid rise in consumption was "undesirable" because______.

A.people saved less

B.people were wealthy

C.people consumed less

D.expenditures on luxuries in creased

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第9题
Does money buy happiness? It's sometimes said that scientists have found no relationship b
etween money and happiness, but that's myth, says University of Illinois psychologist Ed Diener.

The connection is complex. In fact, very rich people rate substantially higher in satisfaction with life than very poor people do, even within wealthy nations, he says. "There is overwhelming evidence that money buys happiness," said economist Andrew Oswald of University of Warwick in England. The main debate, he said, is how strong the effect is.

Oswald recently reported a study of Britons who won between $ 2,000 and $ 250,000 in a lottery (彩票拍奖). As a group, they showed a boost in happiness averaging a bit more than one point on a 36-point scale when surveyed two years after their win, compared to their levels two years before they won.

Daniel Kahnman, a Nobel-Prize winner and Princeton economist, and colleagues, recently declared that the notion that making a lot of money will produce good overall mood is "mostly illusory". They noted that in one study, members of the high-income group were almost twice as likely to call themselves "very happy" as people from households with incomes below $ 20,000. But other studies, rather than asking for a summary estimate of happiness, follow people through the day and repeatedly record their feeling. These studies show less effect of income on happiness. Kahneman and colleagues said.

There is still another twist to the money-happiness story. Even though people who make$150,000 are considerably happier than those who make $ 40,000, It's not clear why, says psychologist Richard E. Lucas of Michigan State University.

Researchers conclude that any effect of money on happiness is smaller than most daydreamers assume. "People exaggerate how much happiness is bought by an extra few thousand," Oswald said. "The quality of relationships has a far bigger effect than quite large rises in salary. It's much better advice, if you're looking for happiness in life, try to find the right husband or wife than to try to double your salary."

The main purpose of this passage is to discuss ______

A.the contributions of household incomes to happiness

B.the complex relationship between money and happiness

C.the positive relationship between money and happiness

D.the negative relations of money to happiness

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第10题
Text 2 It is a wise father that knows his own child, but today a man can boost his pater
nal (fatherly) wisdom – or at least confirm that he’s the kid’s dad. All he needs to do is shell our $30 for paternity testing kit (PTK) at his local drugstore – and another $120 to get the results.

More than 60,000 people have purchased the PTKs since they first become available without prescriptions last years, according to Doug Fog, chief operating officer of Identigene, which makes the over-the-counter kits. More than two dozen companies sell DNA tests Directly to the public , ranging in price from a few hundred dollars to more than $2500.

Among the most popular : paternity and kinship testing , which adopted children can use to find their biological relatives and latest rage a many passionate genealogists-and supports businesses that offer to search for a family’s geographic roots .

Most tests require collecting cells by webbing saliva in the mouth and sending it to the company for testing. All tests require a potential candidate with whom to compare DNA.

But some observers are skeptical, “There is a kind of false precision being hawked by people claiming they are doing ancestry testing,” says Trey Duster, a New York University sociologist. He notes that each individual has many ancestors-numbering in the hundreds just a few centuries back. Yet most ancestry testing only considers a single lineage, either the Y chromosome inherited through men in a father’s line or mitochondrial DNA, which a passed down only from mothers. This DNA can reveal genetic information about only one or two ancestors, even though, for example, just three generations back people also have six other great-grandparents or, four generations back, 14 other great-great-grandparents.

Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared. Databases used by some companies don’t rely on data collected systematically but rather lump together information from different research projects. This means that a DNA database may differ depending on the company that processes the results. In addition, the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.

26.In paragraphs 1 and 2 , the text shows PTK’s ___________.

[A]easy availability

[B]flexibility in pricing

[C] successful promotion

[D] popularity with households

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