题目内容（请给出正确答案）

[单选题]

调制解调器(Modem)的作用是()。

A.将计算机的数字信号转换成模拟信号，以便发送

B.将模拟信号转换成计算机的数字信号，以便接收

C.将计算机数字信号与模拟信号互相转换，以便传输

D.为了上网与接电话两不误

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更多“调制解调器（Modem)的作用是（)。A．将计算机的数字信号…”相关的问题

第1题

For each blank, choose the best answer from the four choices and write down on the answer

sheet.

(71)is a channel' s capacity which directly reflects the data transfer rate of the channel.

(72)functions in a NetWare network which is used to define addressing schemes.

(73)is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.

(74)is the popular LAN developed under the direction of the IEEE802.3.

(75)is a device which enables digital microcomputers to communicate across analog telephone lines.

A．The volume

B．The bandwidth

C．The noise

D．The delay

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第2题

●For each blank, choose the best answer from the four choices and write down on the answer

sheet.

(71) is a channel's capacity which directly reflects the data transfer rate of the channel.

(72) functions in a NetWare network which is used to define addressing schemes.

(73) is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.

(74) is the popular LAN developed under the direction of the IEEE802.3.

(75) is a device which enables digital microcomputers to communicate across analog telephone lines.

(71) A．The volume

B．The bandwidth

C．The noise

D．The delay

(72) A．NetBEUI

B．IP

C．IPX

D．NCP

(73) A．The repeater

B．The hub

C．The bridge

D．The router

(74) A．Token Ring

B．Token Bus

C．Ethernet

D．FDDI

(75) A．The repeater

B．The modem

C．The hub

D．The printer

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第3题

A （74) is a device that enables the computer to handle sounds．A．network cardB．video cardC．

A (74) is a device that enables the computer to handle sounds．

A．network card

B．video card

C．sound card

D．monitor

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第4题

The serial-in, parallel-out shift register is used to transfer data one bit at a time from one parallel data bus to another.（）

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第5题

A（74)is a device that enables the computer to handle sounds.A．network cardB．video cardC．so

A(74)is a device that enables the computer to handle sounds.

A．network card

B．video card

C．sound card

D．monitor

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第6题

A （74) is a device that enables the computer to handle sounds．A．network cardB．video cardC．

A (74) is a device that enables the computer to handle sounds．

A．network card

B．video card

C．sound card

D．monitor

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第7题

A（71) is a device that enables the computer to handle sounds.A．video cardB．network cardC．s

A(71) is a device that enables the computer to handle sounds.

A．video card

B．network card

C．sound card

D．card games

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第8题

In which case would you use a FULL OUTER JOIN？（）

A. Both tables have NULL values.

B. You want all unmatched data from one table.

C. You want all matched data from both tables.

D. You want all unmatched data from both tables.

E. One of the tables has more data than the other.

F. You want all matched and unmatched data from only one table.

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第9题

● Computer（75） is a complex consisting of two or more connected computing units, it is use

d for the purpose of data communication and resource sharing.

（75）A. storage B. device C. network D. processor

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第10题

● Computer（75） is a complex consisting of two or more connected computing units, it is use

d for the purpose of data communication and resource sharing.

（75）A. storage B. device C. network D. processor

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