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Each satellite broadcasts ______ traffic on a designated channel．A.LESB.ESAC.NCSD.EGC

Each satellite broadcasts ______ traffic on a designated channel．

A.LES

B.ESA

C.NCS

D.EGC

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更多“Each satellite broadcasts ____…”相关的问题

第1题

The metriC assigneD to eaCh network DepenDs on the type of protoCol.Some simple protoCol,

like RIP, treats eaCh network as equals.The (71) of passing through eaCh network is the same;it is one (72) Count.So if a paCket passes through 10 network to reaCh the Destination, the total Cost is 10 hop Counts.Other protoCols, suCh as OSPF, allow the aDministrator to assign a Cost for passing through a network BaseD on the type of serviCe requireD.A (73) through a network Can have Different Costs(metriCs).For example, if maximum (74) is the DesireD type of serviCe, a satellite link has a lower metriC than a fiBer-optiC line.On the other hanD, if minimum (75) is the DesireD type of serviCe, a fiBer-optiC line has a lower metriC than a satellite line.OSPF allow eaCh router to have several routing taBle BaseD on the requireD type of serviCe.

（71）

A．numBer

B．ConneCtion

C．Diagram

D．Cost

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第2题

Security selection refers to the（）.

A.allocation of the investment portfolio across broad asset classes

B.analysis of the value of securities

C.choice of specific securities within each asset class

D.top-down method of investing

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第3题

How broad transcription and narrow transcription differ from each other？ Illustrate wit

h examples．宽式音标和严式音标有何区别？举例说明。

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第4题

Asset allocation refers to（）.

A.the allocation of the investment portfolio across broad asset classes

B.the analysis of the value of securities

C.the choice of specific assets within each asset class

D.none of the options

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第5题

Asset allocation refers to the __________.

A)allocation of the investment portfolio(证券投资组合) across broad asset classes

B)analysis of the value of securities，

C)choice of specific assets within each asset class

D)none of the above

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第6题

Programming is a（46)that has various engineering and（47)aspects. Although most of these as

Programming is a(46)that has various engineering and(47)aspects. Although most of these aspects are interrelated, each of them covers a number of(48)and goals winch are very specific. The progress being made in teaching(49)is reflected by the fact that most(50)science curricula contain a broad spectrum of programming courses, each emphasizing a different aspect of programming.

A．notation

B．physical

C．function

D．discipline

E．philosophy

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第7题

● The metric assigned to each network depends on the type of protocol. Some simple protoco

l, like RIP, treats each network as equals. The （71） of passing through each network is the same; it is one （72） count. So if a packet passes through 10 network to reach the destination, the total cost is 10 hop counts. Other protocols, such as OSPF, allow the administrator to assign a cost for passing through a network based on the type of service required. A （73） through a network can have different costs (metrics). For example, if maximum （74） is the desired type of service, a satellite link has a lower metric than a fiber-optic line. On the other hand, if minimum （75） is the desired type of service, a fiber-optic line has a lower metric than a satellite line. OSPF allow each router to have several routing table based on the required type of service.

（71）

A. number

B. connection

C. diagram

D. cost

（72）

A. process

B. hop

C. route

D. flow

（73）

A. flow

B. window

C. route

D. cost

（74）

A. packet

B. throughput

C. error

D. number

（75）

A. delay

B. stream

C. packet

D. cost

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第8题

Satellites are an important part of our ordinary lives．For example, the information for weather forecasts is sent by satellite．Some satellites have cameras which take photographs of the Earth to show how clouds are moving．Satellites are also used to connect our international phone calls．

Computer connections of the World Wide Web and Internet also use satellites. Many of our TV programs come to US through satellites．Airplane pilots also sometimes use a satellite to help them find their exact location．

We use satellites to send television pictures from one part of the world to another．They are usually 35，880 kilometers above the equator．Sometimes we can see a satellite in the sky and it seems to stay in the same place．This is because it is moving around the world at 11，000 kilometers an hour—exactly the same speed that the earth rotates．A satellite must orbit the Earth with its antennae(天线)facing the earth．Sometimes, it moves away from its orbit，So there are little rockets on it which are used to put the satellite back in the right position．This usually happens about every five or six days．

Space is not empty! Every week, more and more satellites are sent into space to orbit the Earth．A satellite usually works for about 10-12 years．Satellites which are broken are sometimes repaired by astronauts or sometimes brought back to Earth to be repaired．Often，very old or broken satellites are left in space to orbit the Earth for a very long time．This is very serious because some satellites use nuclear power and they can crash into each other．

1.Which of the following is NOT done by satellites according to the passage?（）

A. Sending information for weather forecasts.

B. Taking photographs of the Earth.

C. Sending TV pictures.

D. Providing food for airplane pilots.

2.What’s the speed the Earth rotates at?（）

A. 35,880 kilometers per hour.

B. 335,880 kilometers per hour.

C. 11,000 kilometers per hour.

D. 111,000 kilometers per hour.

3.What does the underlined word “This” in paragraph 3 refer to?（）

A. A satellite.

B. A little rocket.

C. A satellite seems to stay in the same place in the sky.

D. The satellite puts the rockets in the right position.

4.How would the very old and broken satellites be dealt with?（）

A. They will be repaired by astronauts.

B. They will be left in space to orbit the Earth for a very long time.

C. They will be brought back to Earth to be repaired.

D. They will be made to crash into each other.

5.What’s the proper title for this passage?（）

A. he ABC about Satellites

B. Satellites Using Nuclear Power

C. The Speed of Satellites

D. How to Deal With Satellites When They are Old and Broken?

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第9题

The purpose of the requirements definition phase is to produce a clear, complete, consiste

nt, and testable (66) of the technical requirements for the software product.

During the requirements definition phase, the requirements definition team uses an iterative process to expand a broad statement of the system requirements into a complete and detailed specification of each function that the software must perform. and each (67) that it must meet. The starting point is usually a set of high-level requirements from the (68) that describe the project or problem.

In either case, the requirements definition team formulates an overall concept for the system and the defines (69) showing how the system will be operated, publishes the system and operation concept documents,and conducts a system concept review(SCR).

Following the SCR, the team derives (70) requirements for the system from the highlevel requirements and the system operations concept. Using structured or object-oriented analysis, the team specifies the software functions and algorithms needed to satisfy each detailed requirements.

A．function

B．definition

C．specification

D．statement

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第10题

Board member: As a longtime member of the colleges board of trustees, I believe that the b

oard has functioned well in the past because each of its members has had a broad range of experience and interests. Thus, if in the future any members are elected primarily to press for a particular policy, such as reducing tuition, the board will function less well. In drawing the conclusion above, the board member must have been making which of the following assumptions？

A．The college will suffer financially if the board reduces tuition.

B．The college will not be able to operate if and when the board functions less well than it does currently.

C．The board functions well because its members are primarily interested in particular academic policies rather than in financial policies such as the level of tuition.

D．In order to be elected as a member of the board, one must have a broad range of experience and interests.

E．Each of the people who would be elected to the board primarily to press for a particular policy lacks a broad range of experience or interests.

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