homework1

HomeworkI.Put the following into English.1.下公共汽车________________________________2.上火车____________________________3. 到达学校（三种）____________________________________________________________4. 到达英国（三种）____________________________________________________________5. 到家（三种）_________________________________________________________________6. 复习功课（二种）______________________________________________________________7. 做眼保健操______________________________8. 做早操____________________________ 9. 上学前__________________________________10. 出墙报___________________________ 11. 帮助他人_______________________________12. 感到快乐_________________________ 13. 老人福利院_____________________________14. 帮助他人_________________________ 15. 玩球类游戏_____________________________16. 在这一天_________________________ 17. 结束（两种）___________________________18. 在这一天__________________________19. 很高兴与我们在一起_________________________________________________________20. 帮助他们洗衣服_____________________________________________________________21. 在食堂吃午饭_______________________________________________________________22. 在音乐教室唱歌_____________________________________________________________23. 在电脑房打游戏_____________________________________________________________24. 在操场上踢足球_____________________________________________________________25. 总是_____________ 通常____________经常__________有时候____________plete the sentences according to the given Chinese.(参考TBP.50)1. can (否定形式) 1. ___________2. _________ 2. must （否定形式）1. _________2. ________3. need （否定形式）1. _____________2._____________4. may （否定形式）_____________5. 学生们不应该在课堂上吃或喝。

Homework-1Name___________________________________MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.1)Financial markets promote greater economic efficiency by channeling funds from ________ to1) ________.A)savers; lenders B)savers; borrowersC)investors; savers D)borrowers; savers2)Stock prices are2)A)relatively stable trending downward at a moderate rate.B)unstable trending downward at a moderate rate.C)relatively stable trending upward at a steady pace.D)extremely volatile.3)3)When I purchase a corporate ________, I am lending the corporation funds for a specific time.When I purchase a corporation's ________, I become an owner in the corporation.A)bond; stock B)stock; debt securityC)stock; bond D)bond; debt security4)4)A financial crisis isA)typically followed by an economic boom.B)a major disruption in the financial markets.C)not possible in the modern financial environment.D)a feature of developing economies only.5) Financial intermediaries5)A)produce nothing of value and are therefore a drain on society's resources.B)hold very little of the average American's wealth.C)can hurt the performance of the economy.D)provide a channel for linking those who want to save with those who want to invest.6)Money is defined as6)A)bills of exchange.B)the unrecognized liability of governments.C)a risk-free repository of spending power.D)anything that is generally accepted in payment for goods and services or in the repayment ofdebt.7)Evidence from business cycle fluctuations in the United States indicates that7)A)recessions are usually preceded by a decline in the growth rate of money.B)a negative relationship between money growth and general economic activity exists.C)recessions are usually preceded by declines in bond prices.D)recessions are usually preceded by dollar depreciation.8)There is a ________ association between inflation and the growth rate of money ________.8)A)positive; demand B)negative; supplyC)positive; supply D)negative; demand9)Countries that experience very high rates of inflation may also have9)A)falling money supplies.B)constant money supplies.C)rapidly growing money supplies.D)balanced budgets.10)10)________ policy involves decisions about government spending and taxation.A)Systemic B)Monetary C)Financial D)Fiscal11)A budget ________ occurs when government expenditures exceed tax revenues for a particular11)time period.A)deficit B)surge C)surplus D)surfeit12)12)Which of the following is most likely to result from a stronger dollar?A)U.S. goods exported abroad will cost more in foreign countries, and so foreigners will buyfewer of them.B)Americans will purchase fewer foreign goods.C)U.S. goods exported aboard will cost less in foreign countries, and so foreigners will buy moreof them.D)U.S. goods exported aboard will cost more in foreign countries and so foreigners will buymore of them.13)13)Which of the following can be described as involving direct finance?A)People buy shares in a mutual fund.B)A corporation issues new shares of stock.C)An insurance company buys shares of common stock in the over-the-counter markets.D)A pension fund manager buys a short-term corporate security in the secondary market.14)14)Which of the following can be described as involving indirect finance?A)A corporation buys a share of common stock issued by another corporation in the primarymarket.B)You make a loan to your neighbor.C)You buy a U.S. Treasury bill from the U.S. Treasury.D)You make a deposit at a bank.15) 15)Securities are ________ for the person who buys them, but are ________ for the individual or firmthat issues them.A)nonnegotiable; negotiable B)assets; liabilitiesC)negotiable; nonnegotiable D)liabilities; assets16)Equity holders are a corporation's ________. That means the corporation must pay all of its debt16)holders before it pays its equity holders.A)residual claimants B)brokersC)underwriters D)debtors17)17)A corporation acquires new funds only when its securities are sold in theA)secondary market by a securities dealer.B)secondary market by a commercial bank.C)primary market by a stock exchange broker.D)primary market by an investment bank.18)A liquid asset is18)A)always sold in an over-the-counter market.B)difficult to resell.C)an asset that can easily and quickly be sold to raise cash.D)a share of an ocean resort.19)Secondary markets make financial instruments more19)A)liquid.B)risky.C)solid.D)vapid.20) 20)A financial market in which only short-term debt instruments are traded is called the ________market.A)bond B)capital C)money D)stock21) 21)U.S. Treasury bills pay no interest but are sold at a ________. That is, you will pay a lowerpurchase price than the amount you receive at maturity.A)discount B)premium C)default D)collateral22) 22)U.S. Treasury bills are considered the safest of all money market instruments because there isalmost no risk ofA)desertion.B)defeat.C)demarcation.D)default.23)Bonds that are sold in a foreign country and are denominated in the country's currency in which23)they are sold are known asA)Eurobonds.B)country bonds.C)equity bonds.D)foreign bonds.24)24)If Microsoft sells a bond in London and it is denominated in dollars, the bond is aA)foreign bond.B)currency bond.C)Eurobond.D)British bond.25)25)An example of economies of scale in the provision of financial services isA)investing in a diversified collection of assets.B)spreading the cost of writing a standardized contract over many borrowers.C)spreading the cost of borrowed funds over many customers.D)providing depositors with a variety of savings certificates.26)26)The process of asset transformation refers to the conversion ofA)safer assets into risky assets.B)risky assets into risky liabilities.C)risky assets into safer assets.D)safer assets into safer liabilities.27) 27)Typically, borrowers have superior information relative to lenders about the potential returns andrisks associated with an investment project. The difference in information is calledA)asymmetric information.B)moral selection.C)risk sharing.D)adverse hazard28)Adverse selection is a problem associated with equity and debt contracts arising from28)A)the lender's inability to legally require sufficient collateral to cover a 100% loss if the borrowerdefaults.B)the lender's relative lack of information about the borrower's potential returns and risks of hisinvestment activities.C)the borrower's lack of incentive to seek a loan for highly risky investments.D)the borrower's lack of good options for obtaining funds.29)An example of the problem of ________ is when a corporation uses the funds raised from selling29)bonds to fund corporate expansion to pay for Caribbean cruises for all of its employees and theirfamilies.A)risk sharing B)moral hazardC)credit risk D)adverse selection30) 30)Increasing the amount of information available to investors helps to reduce the problems of________ and ________ in the financial markets.A)moral hazard; transactions costs B)adverse selection; risk sharingC)adverse selection; moral hazard D)adverse selection; economies of scale31)31)Of money's three functions, the one that distinguishes money from other assets is its function as aA)standard of deferred payment.B)store of value.C)unit of account.D)medium of exchange.32)For a commodity to function effectively as money it must be32)A)hard to carry around.B)difficult to make change.C)deteriorate quickly so that its supply does not become too large.D)easily standardized, making it easy to ascertain its value.33) 33)________ is the relative ease and speed with which an asset can be converted into a medium ofexchange.A)Efficiency B)Specialization C)Deflation D)Liquidity34)34)Of the following assets, the least liquid isA)a house.B)checking deposits.C)traveler's checks.D)stocks.35) 35)Paper currency that has been declared legal tender but is not convertible into coins or preciousmetals is called ________ money.A)funny B)commodity C)electronic D)fiat36)Monetary aggregates are36)A)never redefined since "money" never changes.B)measures of the money supply reported by the Federal Reserve.C)measures of the wealth of individuals.D)reported by the Treasury Department annually.37)37)Which of the following is not included in the measure of M1?A)Currency B)Savings depositsC)NOW accounts D)Demand deposits38) 38)Which of the following is not included in the M1 measure of money but is included in the M2measure of money?A)Currency B)Demand depositsC)Small-denomination time deposits D)Traveler's checks39)If an individual moves money from a small-denomination time deposit to a demand deposit39)account,A)M1 increases and M2 decreases.B)M1 stays the same and M2 stays the same.C)M1 stays the same and M2 increases.D)M1 increases and M2 stays the same.40)40)Which of the following statements accurately describes the two measures of the money supply?A)The two measures' movements closely parallel each other, even on a month-to-month basis.B)Short-run movements in the money supply are extremely reliable.C)The two measures do not move together, so they cannot be used interchangeably bypolicymakers.D)M2 is the narrowest measure the Fed reports.Answer KeyTestname: HOMEWORK-1 CH1-CH31)B2)D3)A4)B5)D6)D7)A8)C9)C10)D11)A12)A13)B14)D15)B16)A17)D18)C19)A20)C21)A22)D23)D24)C25)B26)C27)A28)B29)B30)C31)D32)D33)D34)A35)D36)B37)B38)C39)D40)C。

1、How a cellular phone call is made？Cellular telephone, sometimes called mobile telephone, is a type of short-wave analog or digital telecommunication in which a subscriber has a wireless connection from a mobile phone to a relatively nearby transmitter. The transmitter’s span of coverage is called a cell. As the cellular telephone user moves from one cell or area of coverage to another, the telephone is effectively passed on to the local cell transmitter.A cell phone is - put simply - a kind of two-way radio that acts in the same way as a telephone. However, naturally a cellular phone is much more complex than a simple walkietalkie, as cell phones permit two people to speak at the same time, making calls and receiving calls, three-way calls, call holding, voice mail, text messaging, etc.However, similar to walkie talkies, all mobile phone calls are entirely unprotected and can be intercepted by other devices. Cell phones aren't at all as "secure" as wired telephones. They have the same security level as a radio - which, after all, they are.When you place a cellular phone call, you dial the number and press the send button. A number of steps then follow:●Your cell phone scans for the nearest base station in order to provide it with thestrongest signal and, in turn, the best possible connection. It checks 21 different control channels to determine the strongest available signal.●Your cell phone then selects the strongest signal for its use.●An origination message (a very short message of about ¼ second in length) isthen sent by the cellular phone, which includes its MIN (Mobile Identification Number, that is, your cellular phone number), as well as the ESN (Electronic Serial Number), and the number that has been dialed.●Once the cellular service provider verifies that you are among its customers -based on the sent-out MIN and ESN - the base station sends a channel assignment message to the cellular phone (another ¼ of a second in length), telling the phone where the conversation will be.●The cell phone then tunes into that assigned channel and the call begins.All of this has happened by the time you hear the ringing or busy signal on the other end of the phone.2、Why the cellular pattern is hexagon?In a cellular System a land area is divided into regular shaped cells, which can be hexagonal, square, circular or some other irregular shapes, although hexagonal cells are conventional. This is because there are some criteria for the cell shape, which are ●Geometric shape●Area without overlap●Area of the cellAnd the eligible shapes for these criteria are Square, circle, equilateral triangle&hexagon.The Geometric shape & Area without overlap is satisfied by a hexagon,square, equilateral triangle as they can be fitted in a manner where there is no area of overlap. The circle on the other hand would overlap (which implies interference of signals) or leave gaps (which means loss of coverage in those areas) when not overlapping.When the area factor is considered a circle has the highest area however it does not satisfy the second criteria of overlap. Therefore we have to consider a shape which fits correctly and also has maximum area.For this purpose we shall compare the area of the remaining shapes to the area of circle to see which has the maximum area.The area of an equilateral triangle to a circle approx = 17.77%The area of a square to a circle approx = 63.7%The area of a hexagon to a circle approx = 83%Which means hexagon has the highest coverage area after a circle from the lot.Thus of the lot hexagon satisfies all the conditions which is why the shape of a cell is hexagonal in cellular network.More than likely because the antennas used have a radiation pattern of 60 degrees. Thus 6 are required for full 360 degree coverage.If you look at the top of a cell phone tower, you will see the vertical arrays that constitute the antennas, usually with the form of long vertical rectangles or boxes, sometimes arranged in parallel groups. A more detailed inspection would reveal that the vertical arrays are separated 120ºfrom each other. This means that each array is pointing to the center of its hexagonal cell. Hence, each cell is covered by six arrays from six separate towers, one at the apex of each of its six angles.Each provider can use a fixed set of frequencies, which forces them to assign a limited number of frequencies to each adjacent cell; the frequencies start repeating on the non-adjacent cells. Similarly, each antenna array can serve a limited number of subscribers at any given time. All this means that when traffic increases within a cell (more users), the only way of coping with the extra traffic is to reduce the area of the cell so it serves less subscribers. This is done by adding more towers to form smaller cells, hence the constant demand for cell tower sites. When a cell is fractioned in smaller cells, the antenna arrays that serve the new cells are lowered and their power is reduced so their emitted energy does not go beyond the adjacent cells to avoid interfering with those other cells, farther cells that use the same sets of frequencies.Having the cell phone towers closer to each other means that the signal, although purposely weakened, can now reach inside elevators and concrete buildings. This also means that cell phones need to transmit in their high power setting much less time while in use, which allows for smaller handsets whose batteries last longer. Hint,Farthest for interference and largest area of cellFewest number of cellClose to circular pattern , applying omni-direction antenna。

homework的用法总结一、什么是“homework”?作业，或者叫做家庭作业，是指学生在课堂之外完成的任务。

它是教育过程中非常重要的一部分，对学生的学习效果起着巨大的影响。

在不同的教育体系和文化背景下，作业有各种形式和目标。

本篇文章将对“homework”的用法进行总结和探讨。

二、作业的目标1.强化学习：作业可以帮助学生加深对已经学过内容的理解，加强记忆。

通过练习和复习之前所学知识，培养扎实基础和掌握技能。

2.培养自主学习：通过布置适当难度的作业，并给予学生适当支持与反馈鼓励他们独立思考解决问题，培养并提高他们组织时间、自我激励、解决问题等能力。

这样，在未来面临新挑战时他们更有信心应对。

3.拓展阅读：通过布置与课堂内容相关联或者扩展内容不同领域书籍阅读，让学生接触到更多信息，增加知识面，培养阅读兴趣以及理解能力。

三、作业的类型1.练习题：练习题是最常见的作业形式之一，它用来巩固学生对知识点的理解和运用。

这种类型的作业通常要求学生回答一系列问题或完成问题集合。

练习题可以涵盖不同难度级别，从简单到复杂。

2.项目作业：项目作业有助于培养学生独立思考、创造性解决问题以及协作能力。

通过给予学生任务和材料，要求他们进行研究和探索，并最终呈现一个创意性的成果。

3.阅读/写作任务：阅读和写作任务是提高学生语言运用和表达能力的重要方法。

老师可能会指定特定阅读材料并要求学生完成相关讨论或撰写论文、报告等。

四、“homework”的利与弊1.好处：在正确使用的情况下，“homework”可以为学生带来许多好处。

它促使学生在紧凑课程中进行巩固和拓展,增加了额外时间供学生自主探索问题或更深入地研究了解。

它还促使学生形成自我管理和自律能力,提高了组织和时间管理技巧。

2.弊端：然而，“homework”也存在一些潜在的问题，当使用不当时可能会产生负面影响。

过多的作业可能导致孩子过度焦虑、压力增加，甚至影响到他们的家庭、兴趣爱好和社交活动。