为提高混凝土的抗钢筋锈蚀和耐久性,可在混凝土拌和物中加入()。 A.烷基苯磺酸盐 B.石油磺
为提高混凝土的抗钢筋锈蚀和耐久性,可在混凝土拌和物中加入()。
A.烷基苯磺酸盐
B.石油磺酸盐
C.明显增大
D.松香皂
为提高混凝土的抗钢筋锈蚀和耐久性,可在混凝土拌和物中加入()。
A.烷基苯磺酸盐
B.石油磺酸盐
C.明显增大
D.松香皂
第1题
An internet is a combination of networks connected by (71) .When a datagram goes from a source to a (72) ,it will probably pass many (73) until it reaches the router attached to the destination network.A router receives a (74) from a network and passes it to another network.A router is usually attached to several networks.When it receives a packet,to which network should it pass the packet? The decision is based on optimization: Which of the available (75) is the optimum pathway?
A.modems
B.routers
C.switches
D.computers
第2题
An internet is a combination of networks connected by (71) .When a datagram goes from a source to a (72) ,it will probably pass many (73) until it reaches the router attached to the destination network.A router receives a (74) from a network and passes it to another network.A router is usually attached to several networks.When it receives a packet,to which network should it pass the packet? The decision is based on optimization: Which of the available (75) is the optimum pathway?
A.modems
B.routers
C.switches
D.computers
第3题
An internet is a combination of networks connected by (1). When a datagram goes from a source to a? (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a? (4) from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5) is the optimum pathway?
空白(4)处应选择()
A. destination
B. resource
C. packet
D. source
第4题
An internet is a combination of networks connected by (1). When a datagram goes from a source to a? (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a? (4) from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5) is the optimum pathway?
空白(2)处应选择()
A. user
B. host
C. city
D. destination
第5题
An internet is a combination of networks connected by (1). When a datagram goes from a source to a? (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a? (4) from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5) is the optimum pathway?
空白(5)处应选择()
A. pathways
B. routers
C. diagrams
D. calls
第6题
An internet is a combination of networks connected by (1). When a datagram goes from a source to a? (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a? (4) from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5) is the optimum pathway?
空白(3)处应选择()
A. destinations
B. routers
C. packets
D. computers
第7题
() are collections of two or more connected computers.
A、VPN
B、Modem
C、Networks
D、Cable
第8题
If your computer is connected to a host that is an ISP(Internet Service Provider),you can negotiate with the master of the host that your computer is connected to the Internet as a host rather than a terminal.
第9题
The Internet is a world wide collection of networks that use the TCP/IP protocols to facilitate data transmission and exchange.()
第10题
Begun in the late 1960s by Pentagon weapons researchers as a system for easing
communication between computers in disparate electric networks,
the Internet has evolved 【M1】______
into a popular vehicle for scientific research, communication, entertainment, and more. It
links together thousands of computer networks such as
those belonging to corporations, 【M2】______
commercial services, universities, and research centers, joining them as branches on a tree
to larger networks known as backbones. Once a computer is on-line, that is, connected by
modem or networking equipment of the Internet,
the user can search through data banks 【M3】______
for documents, chat with other computer users,
or instant send opinions and observations 【M4】______
to the likes of President Bill Clinton, film critic Roger Ebert, or rocker Billy Idol (just to name
a few). No central governing body runs the Internet,
and nobody has an exact census of 【M5】______
users. But estimates of the number already range from around 10 million to as high as 5
million. Well over 10,000 separated computer networks
are connected by the Internet, and 【M6】______
total traffic was expected to double during 1993. Today, the Internet is free resources and
commercial services that provide databases and computer files with a fee.
Publishers are 【M7】______
seeking to make books and periodicals available on the Internet as a profit-making adventure.
Meanwhile, works in the public domain have begun appearing on the Internet for【M8】______
users to "upload" to their computers virtually free of charge.
With electronic access to data 【M9】______
from all over the world, scholarly research that in the past would have required months of
travel could now be done at one' s desk. 【M10】______
【M1】
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