In TCP, _____ prevents a fast computer sending so much data that it overruns a slow receiver.
A、congestion control
B、flow control
C、stop-and-wait
D、sliding window
A、congestion control
B、flow control
C、stop-and-wait
D、sliding window
The riding pawl is ______.
A.a safety interlock in a cargo winch that prevents the runner from overspeeding
B.a stopper that prevents the anchor cable from running free if the cable jumps the wildcat
C.the device that locks the deck lashings of the Peck and Hale system
D.the lug that rides on the eccentric rib and engages the locking ring on the windlass
How does aspirin reduce fever?
A.It slows down human reactions to fever.
B.It prevents the formation of the fever-related chemical reactions.
C.It interferes with the formation of some acids.
D.It makes human body unconscious of pains.
Passage 2
Individuals and businesses have legal protection for intellectual property they create and own. Intellectual property _1_ from creative thinking and may include products, services, processes, and ideas. Intellectual property is protected from misappropriation (盗用).Misappropriation is taking the intellectual property of others without _2_ compensation and using it for monetary gain. Legal protection is provided for the owners of intellectual property. The three common types of legal protection are patents, copyrights, and trademarks. Patents provide exclusive use of inventions. If the U.S. Patent Office _3_ a patent, it is confirming that the intellectual properly is unique. The patent prevents others from making, using, or selling the invention without the owner’s _4_ for a period of 20 years. Copyrights are similar to patents except that they are applied to artistic works. A copyright protects the creator of an original artistic or intellectual work, such as a song or a novel. A copyright gives the owner exclusive rights to copy _5_, display, or perform. the work. The copyright prevents others from using and selling the work. The lehgth of a copyright is _6_ the lifetime of the author plus an additional 70 years. Trademarks are words, names, or symbols that identify the manufacturer of a product and _7_ it from similar goods of others. A servicemark is similar to a trademark but is used to identify services. A trademark prevents others from using the __8_ or a similar word, name, or symbol to take advantage of the recognition and _9_ of the brand or to create confusion in the marketplace.Upon registration, a trademark is usually granted for a period of ten years. It can be _10_ for additional ten-year periods indefinitely as long as the mark’s use continues.
A)recurred
B)identical
C)due
D)typically
E)grants
F)parallel
G)popularity
H)distinguish
I)retrieves
J)renewed
K)distribute
L)results
M)random
N)permission
O)instantaneously
第1空答案是:
下列选项中哪些属于 TCP/IP 应用层的协议()
A) FTP
B) 802.1q
C) Telnet
D) SNMP
E) TCP
F) IP
下列选项中哪些属于 TCP/IP 网际层的协议()
A) FTP
B) 802.1q
C) IP
D) ICMP
E) TCP
F) ARP
A.TFTP
B.SMTP
C.SNMP
D.FTP
E.HTTP
F.HTTPS
The Internet is a world wide collection of networks that use the TCP/IP protocols to facilitate data transmission and exchange.()
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