if total dollar amount of debit entries in an account is more than total dollar amoun

In general, the amount that a student spends for housing should be held to one-fifth the total _________ for living expenses.

A) acceptable B) available C) advisable D) applicable

下表给出了一家厂商的单位产品销售价格（单位:美元)和总成本的信息，（1)填充表中空格。（2)如果价

下表给出了一家厂商的单位产品销售价格(单位:美元)和总成本的信息，

(1)填充表中空格。

(2)如果价格从60美元下降到50美元，企业的产量选择和利润将如何变化？

The data in the following table give information about the price (in total ) for which a firm can sell a unit of output and the total cost of production.

a.Fill the blanks in the table.

b.Show what happens to the firm' s output choice and profit if the price of the product falls from$60 to $50.

By almost any measure , there is a boom in Internet-based instruction . In just a few years , 34 percent of American universities have begun offering some form of distance learning (DL), and among the larger schools , it’s closer to 90 percent . If you doubt the popularity of the trend, you probably haven’t. It enrolls 90,000 student, a statistic used to support its claim to be the largest private university in the country.

While the kinds of instruction offered in these programs will differ, DL usually signifies a course in which the instructions post syllabi(课程大纲), reading assignments , and schedules on Websites , and students send in their assignments by e-mail . Generally speaking, face-to-face communication with an instructor is minimized or eliminated altogether.

According to the passage , distance learning is basically characterized by_____

A) A considerable flexibility in its academic requirements

B) The great diversity of students’ academic backgrounds

C) A minimum or total absence of face-to-face instruction

D) t the casual relationship between students and professors

(1)企业目前的产量为100单位，成本最小化的劳动和资本分别为20和5。在图上用等产量线和等成本线表示出来。

(2)企业想将产量扩大为140单位，如果资本在短期固定，需要多少劳动？在图形上表示出来，并计算企业新的成本。

(3)在图形上表示出企业在长期生产140单位产品的成本最小化劳动和资本投入。

(4)如果边际技术替代率为K/L,计算生产140单位产品的最优劳动和资本投入。

Suppose that a firm' s production is q= 10L1/2K1/2. The cost of a unit of labor is $ 20 and the cost of a unit of capital is $ 80. a The firm is currently production 100 unis of output and has determined that the cost - mini-mizing quantities of labor and capital are 20 and 5, respectively. Graphically illustrate this using isoquants and isocost lines.

b，The firm now wants to increase output to 140 units. If capital is fixed in the short run, how much labor will the firm require？ Illustrator this graphically and find the firms new total cost.

c. Graphically identify the cost - minimizing level of capital and labor in the long run if the firm wants to produce 140 units.

d. If the marginal rate of technical substitution is K/L, find the optimal level of capital and labor required to produce the 140 units of output.

and that race believes certain things and so on. Yet, the __41__ phenomenon of race consists of a few surface indications.

We judge race usually __42__ the coloring of the skin: a white race, a brown race, a yellow race and a black race. But __43__ you were to remove the skin you could not __44__ anything about the race to which the individual belonged. There is __45__ in physical structure. The brain or the internal organs to __46__ a difference.

There are four types of blood. __47__ types are found in every race, and n o type is distinct to any race. Human brains are the __48__. No scientists could examine a brain and told you the race to which the individual belonged. Brains will __49__ in size, but this occurs within every race. __50__ does size have anything to do with intelligence. The largest brain __51__ examined belonged to a person of weak __52__. On the other hand, some of our most distinguished people have had __53__ brains.

Mental tests which are reasonably __54__ show no differences in intelligence between races. High and low test results both can be recorded by different members of any race. __55__ equal educational advantages, there will be no difference in average standings, either on account of race or geographical location.

Individuals of every race __56__ civilization to go backward or forward. Training and education can change the response of a group of people, __57__ enable them to behave in a __58__ way.

The behavior. and ideas of people change according to circumstances, but they can always go back or go on to something new __59__ is better and higher than anything __60__ the past.

41. a. complete b. full c. total d. whole

42. a. in b. from c. at d. on

43. a. since b. if c. as d. while

44. a. speak b. talk c. tell d. mention

45. a. something b. everything

c. nothing d. anything

46. a. display b. indicate c. demonstrate d. appear

47. a. All b. Most c. No d. Some

48. a. same b. identical c. similar d. alike

49. a. remain b. increase c. decrease d. vary

50. a. Only b. Or c. Nor d. So

51. a. ever b. then c. never d. once

52. a. health b. body c. mind d. thought

53. a. big b. small c. minor d. major

54. a. true b. exact c. certain d. accurate

55. a. Provided b. Concerning

c. Given d. Following

56. a. make b. cause c. move d. turn

57. a. and b. but c. though d. so

58. a. ordinary b. peculiar c. usual d. common

59. a. that b. what c. whichever d. whatever

60. a. for b. to c. within d. in