The exist written descriptions about diseases were dated back to ________.

An architectural Style. defines as a family of such systems in terms of a (1) of structural organization.More specifically an architectural style. defines a vocabulary of (2) and connector types, and a set of (3) on how they can be combined. For many styles there may also exist one or more (4) that specify how to determine a system's overall properties from the properties of its parts. Many of architectural styles have been developed over the years.The best-known examples of (5) architectures are programs written in the Unix shell．

(1)

A．pattern

B．data flow

C．business process

D．position level

ural organization. More specifically, an architectural style. defines a vocabulary of （72）and connector types, and a set of （73） on how they can be combined. For many styles themay also exist one or more （74） that specify how to determine a system’s overall propertfrom the properties of its parts. Many of architectural styles have been developed over the yearThe best-known examples of （75） architectures are programs written in the Unix shell.

（71）

A. pattern

B. data flow

C. business process

D. position level

（72）

A. metadata

B. components

C. models

D. entities

（73）

A. functions

B. code segments

C. interfaces

D. constraints

（74）

A. semantic models

B. weak entities

C. data schemas

D. business models

（75）

A. event-based

B. object-oriented

C. pipe-and-filter

D. layered

l organization．More specifically, an architectural style. defines a vocabulary of （72）and connector types, and a set of （73） on how they can be combine

D. For many styles there may also exist one or more （74）that specify how to determine a system's overall properties from the properties of its parts．Many of architectural styles have been developed over the years.

The best-known examples of（75）architectures are programs written in the Unix shell.

（71）

A. pattern

B. data flow

C. business process

D. position level

（72）

A. metadata

B. components

C. models

D. entities

（73）

A. functions

B. code segments

C. interfaces

D. constraints

（74）

A. semantic models

B. weak entities

C. data schemas

D. business models

（75）

A. event-based

B. object-oriented

C. pipe-and-filter

D. layered

The de facto standard Application Program Interface (API) for TCP/IP applications is the “sockets” interface. Although this API was developed for （71） in the early 1960s it has also been implemented on a wide variety of no-Unix systems. TCP/IP （72） Written using the sockets API have in the past enjoyed a high degree of portability and we would like the same （73） with IPv6 applications. But changes are required to the sockets API to support IPv6 and this memo describes these changes. These include a new socket address structure to carry IPv6 （74） ,new address conversion functions, and some new socket options. These extensions are designed to provide access to the basic IPv6 features requited by TCP and UDP applications, including multicasting, while introducing a minimums of change into the system and providing complete （75） for existing IPv4 applications.

A.Windows

B.Linux

C.Unix

D.DOS

In a telephone survey of more than 2, 000 adults, 21% said they believed the sun revolved(旋转)around the earth. An【C1】______7% did not know which revolved around【C2】______. I have no doubt that【C3】______all of these people were【C4】______in school that the earth revolves around the sun.【C5】______may even have written it【C6】______a test. But they never【C7】______their incorrect mental models of planetary(行星的)motion【C8】______their everyday observations didn't support【C9】______they know. Their teachers told them people see the sun "moving【C10】______the sky as morning turns to night, and the earth seems stationary(静止的)【C11】______that is happening. Students can learn the right answers【C12】______heart in class, and yet never combined them【C13】______their working models of the world. The objectively correct answer the professor accepts and the【C14】______personal understanding of the world can exist side by side, each【C15】______by the other.

Outside of class, the student continues to use the【C16】______model because it has always worked well【C17】______that circumstance. Unless professors address【C18】______errors in students' personal models of the world, students are not【C19】______to replace them with the【C20】______one.

【C1】

A．excessive

B．extra

C．additional

D．added

The lab ceased to exist as an independent drug research __________in January2004.

A． instance

B． insurance

C． instruction

D． institution

nization does not physically exist, but enabled by software to exist.()

A.stay

B. survive

C. exist

D. last