10[综合题] 某电子商务企业每年需购进某种商品20000件。已知该商品的单位购进成本为l0元，订购成本为20元，储存成本为5元，如果允许延期交货，并且每单位每年的延期交货成本为2元，问经济批量，年库存总成本和年订购次数是多少?

>> 河南成教 / 现代物流概论

河南成教 / 现代物流概论

10[综合题]

某电子商务企业每年需购进某种商品20000件。已知该商品的单位购进成本为l0元，订购成本为20元，储存成本为5元，如果允许延期交货，并且每单位每年的延期交货成本为2元，问经济批量，年库存总成本和年订购次数是多少?

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现代物流概论

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可特异性杀伤病毒感染细胞的免疫细胞是: A、 Tc细胞 B、 Th细胞 C、 NK细胞 D、 Ts细胞 E、巨噬细胞病原生物学

4[阅读题] Passage1 Youth is not a matter of time but a matter of self-improvement, both physically and morally. Being a good youth, one should have those factors: the basic one is health. A healthy body is a kind of priceless treasure. One can do nothing without it. Secondly, we should pay essential attention to our moral character. We should be always willing to help those in trouble without any complaints. Moreover, we should care more about the people around us. Thirdly, cooperation and communication also play an important role in being a good youth. No one can live alone without any friends. And nobody can work out every problem without help of partners. So the youth should and must learn how to live and work well with others, including those people you don't like to cooperate or communicate with. The last but not the least, patriotism, meaning a love of one's country, is the one we should never forget. People always misunderstand the word “patriots” by thinking it only refers to those fighters who fight for their country. As a matter of fact, a patriot will do the things his country asks him to do. So being a youth is one thing, being a good one really needs to take every effort to make yourself to be. 　　1. The passage really wants to tell us that ________. 　　A) what the meaning of “patriots” is 　　B) the qualities a good youth should have 　　C) a youth should be doing good　　D) one should help others 　　2. The first thing a good youth should have is 　　A) the best looking 　　B)the best riches 　　C) the good ability 　　D)a healthy body 　　3. A good youth should help others 　　A) willingly 　　B) at his convenience 　　C) if he wants to 　　D) with complains 　　4. From the passage, we can know that cooperation and communication are 　　A) good for some introverts 　　B) helpful to us 　　C) important to everyone 　　D) not necessary to good friends 　　5. In the author's opinion, the patriots must 　　A) fight for the country 　　B) learn everything 　　C) do what their country need them to do 　　D)protect their family and country BDACC Passage 2 Normally a student must attend a certain number of courses in order to graduate, and each course which he attends gives him a credit which he may count towards a degree. In many American universities the total work for a degree consists of thirty-six courses each lasting for one semester. A typical course consists of three classes per week for fifteen weeks; while attending a university a student will probably attend four or five courses during each semester. Normally a student would expect to take four years attending two semesters each year. It is possible to spread the period of work for the degree over a longer period. It is also possible for a student to move between one university and another during his degree course, though this is not in fact done as a regular practice. For every course that he follows a student is given a grade, which is recorded, and the record is available for the student to show to prospective employers. All this imposes a constant pressure and strain of work, but in spite of this some students still find time for great activity in student affairs. Elections to positions in student organizations arouse much enthusiasm. The effective work of maintaining discipline is usually performed by students who advise the academic authorities. Any student who is thought to have broken the rules, for example, by cheating has to appear before a student court. With the enormous numbers of students, the operation of the system does involve a certain amount of activity. A student who has held one of these positions of authority is much respected and it will be of benefit to him later in his career. 1. Normally a student would at least attend __________classes each week. A) 36 B) 12 C) 20 D) 15 2. According to the first paragraph an American student is allowed _______. A) to live in a different university B) to take a particular course in a different university C) to live at home and drive to classes D) to get two degrees from two different universities 3. American university students are usually under pressure of work because_________. A) their academic performance will affect their future careers B) they are heavily involved in student affairs C) they have to observe university discipline D) they want to run for positions of authority 4.Some students are enthusiastic for positions in student organizations probably because_________. A) they hate the constant pressure and strain of their study B) they will then be able to stay longer in the university C) such positions help them get better jobs D) such positions are usually well paid 5. The student organizations seem to be effective in _________. A) dealing with the academic affairs of the university B) ensuring that the students observe university regulations C) evaluating students’ performance by bringing them before a court D) keeping up the students’ enthusiasm for social activities BADCD Passage 3 What are the beauties of Hawaii? Let’s start with four. The beach, famous for its water temperature, air temperature and waves, is the first beauty. There are hundreds of miles of beaches on the twenty islands of Hawaii. They are thought to be among the finest beaches in the world. Then, what do you think would be the second beautiful thing? It is volcanoes (火山), of course. These volcanoes are not just a part of the islands; they made the islands in the first place. Because of them the islands are still growing. What would be the third thing of beauty that the first visitor to Hawaii would notice? It probably wouldn’t be just one thing, but many things: all the wonderful fruits and flowers of the islands. Sugar cane, bananas and pineapples are Hawaii’s biggest exports. Sugar cane has been growing in Hawaii for a thousand years. As for pineapples, the islands produce more than any other places in the world, which has made Dole Company the biggest fruit-packing company in the world. The fourth and most beautiful thing about Hawaii is the people who live there. The Hawaiians never rush, and perhaps this is because they care more for human life than they care for the machine. There is an old Hawaiian law that a man can go to sleep in the middle of the road if he wants to. What makes the people of Hawaii so beautiful is their feeling about people. There are 64 different combinations of races on the islands, and they all live in peace. They believe “Above all nations is humanity.” That is the most beautiful thing of all. 26. According to the passage, Hawaii is made up of __. A. one island B. twenty islands C. sixty-four islands D. hundreds of islands 27. Why are the volcanoes so special to the islands? A. They are not a part of the islands. B. They actually made the islands. C. They are the first in the world. D. They are growing. 28. What has made Dole Company the biggest fruit-packing company in the world? A. Sugar. B. Sugar cane. C. Bananas. D. Pineapples. 29. The people in Hawaii are the most beautiful thing because _ _. A. they had a peaceful history B. they can sleep in the middle of the road C. there are 64 different races on the islands D. they care more for people than anything else 30. According to the passage, “above all nations is humanity” might mean __ . A. not all nations have humanity B. humanity is as important as a nation C. humanity has no national boundaries D. all human beings should live in peace BBDDC英语语音

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