（）is the environmental process to collect sort transport bur

Makers of consumer electronics will pay for environmental sanitation services to collect and ( ) used refrigerators, computers and televisions under the new rules.

A、discharge

B、distribute

C、dispose of

D、deal with

A.Mysqlaccess

B.Mysqldump

C.Mysqlshow

D.Mysqlslow

E.Mysqldumpslow

Many people see pollution as only. part of______.

A. the environmental balance

B. our daily life

C. the consumption of goods by man

D. the whole process of industrial production and consumption of goods

Data transfer is slow between the source and destination. The quality of service requested by the transport layer in the OSI reference model is not being maintained. To fix this issue, at which layer should the troubleshooting process begin?（）

A. presentation

B. session

C. transport

D. network

E. physical

● A transport layer protocol usually has several responsibilities. One is to create a process-to-process communication; UDP uses （71） numbers to accomplish this. Another responsibility is to provide control mechanisms at the transport level. UDP does this task at a very minimal level. There is no flow control mechanism and there is no （72） for received packet. UDP,however, does provide error control to some extent. If UDP detects an error in the received packet, it will silently drop it．

The transport layer also provides a connection mechanism for the processes. The （73） must be able to send streams of data to the transport layer. It is the responsibility of the transport layer at （74） station to make the connection with the receiver, chop the stream into transportable units,number them, and send them one by one. It is the responsibility of the transport layer at the receiving end to wait until all the different units belonging to the same process have arrived, check and pass those that are （75） free, and deliver them to the receiving process as a stream.

（71）A．hop B．port C．route D．packet

（72）A．connection B．window C．acknowledgement D．destination

（73）A．jobs B．processes C．programs D．users

（74）A．sending B．routing C．switching D．receiving

（75）A．call B．state C．cost D．error

()is the process of formalizing acceptance of the completed project deliverables. The key benefit of this process is that it brings objectivity to the acceptance process and increases the probability of final product, service,or result acceptance by validating each deliverable。

A、Validate scope

B、Define scope

C、Control scope

D、Collect requirement

第三组：

Ship recycling contributes to sustainable development and is the environmentally friendly way of disposing of ships with virtually every part of the hull, machinery, equipment, fittings and even furniture being re-used. However, while the principle of ship recycling is a sound one, the reported status of working practices and environmental standards in recycling facilities often leaves much to be desired. Such growing concerns about environmental safety, health and welfare matters in the ship recycling industry have resulted in a growing belief that an international instrument to regulate the ship recycling process is urgently needed.

Having become aware of the need to reduce the environmental, occupational health and safety risks related to ship recycling, as well as the need to secure the smooth withdrawal of ships that have reached the end of their operating lives, the International Maritime Organization (IMO) has taken action to develop a realistic and effective solution to the problem of ship recycling, which will take into account the particular characteristics of international maritime transport and the economic realities.

Which statement of the following is true?

A.Ship recycling is sustainable

B.Ship recycling is very friendly to our environment

C.Ship recycling is the best way to dispose the machinery, equipment, fittings and even furniture on board

D.Ship recycling brings many problems concerning environmental safety, health and______occupational safety

● A transport layer protocol has several responsibilities. One is to create a process-to-process (program-to-program) communication; TCP uses port （71） to accomplish this. Another responsibility of a transport layer protocol is to create a （72） and error-control mechanism at the transport level. TCP uses a sliding （73） protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve （74） control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends （75） of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver.

（71）

A. numbers

B. connections

C. diagrams

D. resources

（72）

A. procedure

B. function

C. route

D. flow

（73）

A. path

B. window

C. frame

D. diagram

（74）

A. packet

B. time

C. error

D. phase

（75）

A. ports

B. streams

C. packets

D. cells

Together with the network layer,the transport layer is the heart of the protocol（ ）The network layer provides end-to-end（ ） delivery using datagrams or virtual circuits.The transport layer builds on the network layer to provide data transport from a process on a（ ）machine to a process on a destination machine with a desired level of reliability that is independent of the physical （ ） currently in use.It provides the abstractions that applications nedd to use the network..Without the（ ） layer,the whole concept of layered protocols would make little sense.

A.transport B.network C.hierarchy D.service A.packet B.data C.command D.record A.connection B.terminal C.source D.destination A.traffic B.connection C.lines D.networks A.network B.transport C.link D.physical