At some pint adding more of a variable input, such as labor,..

第1题

Given the advantages of electronic money, you might think that we would move quickly to the cashless society in which all payments are made electronically. 1 a true cashless society is probably not around the corner. Indeed, predictions have been 2 for two decades but have not yet come to fruition. For example, Business Week predicted in 1975 that electronic means of payment would soon "revolutionize the very 3 of money itself," only to 4 itself several years later. Why has the movement to a cashless society been so 5 in coming？

Although electronic means of payment may be more efficient than a payments system based on paper, several factors work 6 the disappearance of the paper system. First, it is very 7 to set up the computer, card reader, and telecornmunications networks necessary to make electronic money the 8 form. of payment Second, paper checks have the advantage that they 9 receipts, something thai many consumers are unwilling to 10 . Third, the use of paper checks gives consumers several days of "float" - it takes several days 11 a check is cashed and funds are 12 from the issuer&39;s account, which means that the writer of the check can cam interest on the funds in the meantime. 13 electronic payments arc immediate, they eliminate the float for the consumer.

Fourth, electronic means of payment may 14 security and privacy concerns. We often hear media reports that an unauthorized hacker has been able to access a computer database and to alter information 15 there. The fact that this is not an 16 occurrence means that dishonest persons might be able to access bank accounts in electronic payments systems and 17 from someone else&39;s accounts. The 18 of this type of fraud is no easy task, and a new field of computer science is developing to 19 security issues. A further concern is that the use of e lectronic means of payment leaves an electronic 20 that contains a large amount of personal data. There are concerns that government, employers, and marketers might be able to access these data, thereby violating our privacy.

1

A.However

B.Moreover

C.Therefore

D.Otherwise

2A.off

B.back

C.over

D.around

7A.imaginative

B.expensive

C.sensitive

D.productive

8A.similar

B.original

C.temporary

D.dominant

9A.collect

B.provide

C.copy

D.print

10A.give up

B.take over

C.bring back

D.pass down

11A.before

B.after

C.since

D.when

12A.kept

B.borrowed

C.released

D.withdrawn

13A.Unless

B.Until

C.Because

D.Though

14A.hide

B.express

C.raise

D.ease

16A.unsafe

B.unnatural

C.uncommon

D.unclear

17A.steal

B.choose

C.benefit

D.return

18A.consideration

B.prevention

C.manipulation

D.justification

6A.for

B.against

C.with

D.on

20A.chunk

B.chip

C.path

D.trail

15A.analyzed

B.shared

C.stored

D.displayed

3A.power

B.concept

C.history

D.role

19A.cope with

B.fight against

C.adapt to

D.call for

5A.silent

B.sudden

C.slow

D.steady

4A.reward

B.resist

C.resume

D.reverse

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第2题

Which of the following process will you class as physical changes?

A、The preparation of sugar syrup by adding sugar to hot water.

B、The burning of a tree.

C、The sublimation of iodine.

D、The manufacture of salt by mixing sodium hydroxide with hydrogen chloride.

E、The boiling of water.

F、The mixing of table and rock salts.

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第3题

A fixed factor is a factor of production that is used in fixed proportion to the level of output.

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第4题

A profit-maximizing competitive firm uses just one input, x. Its production function is q = 8x1/2. The price of output is 16 and the factor price is 8. The amount of the factor that the firm demands is:

A、10

B、22.63

C、64

D、48

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第5题

Just as in the theory of utility maximizing consumers, the theory of profit maximizing firms allows the possibility of "Giffen factors". These are factors for which a fall in price leads to a fall in demand.

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第6题

The production function is given by F (L)=6L2/3 . Suppose that the cost per unit of labor is 12 and the price of output is 6, how many units of labor will the firm hire?

A、16

B、8

C、4

D、24

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第7题

A competitive firm produces output using three fixed factors and one variable factor. The firm's short run production function is q=163x-2x2, where x is the amount of variable factor used. The price of output is $3 per unit and the price of the variable factor is $9 per unit. In the short run, how many units of x should the firm use?

A、20

B、80

C、19

D、40

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第8题

Which of the following is a short-run adjustment?

A、A local bakery hires two additional bakers

B、Six new firms enter the plastics industry

C、The number of farms in the United States declines by 5 percent

D、BMW constructs a new assembly plant in South Carolina

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第9题

When Farmer Hoglund applies N pounds of fertilizer per acre, the marginal product of fertilizer is 1-(N=200) bushels of corn. If the price of corn is $1 per bushel and the price of fertilizer is $0.40 per pound, then how many pounds of fertilizer per acre should Farmer Hoglund use in order to maximize his profits?

A、120

B、240

C、64

D、248

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At some pint adding more of a variable input, such as labor, to the same amount of a fixed