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:
Mooring lines should be turned end-for-end occasionally. This is because ______.
A.a line is weakened by constantly pulling on it in one direction
B.normal wear on the line is thus distributed to different areas
C.it prevents the line from kinking or unlaying
D.it prevents permanent misalignment of the line’s internal strands
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第9题:
change from smooth curves within the air mass to sharp bends at the front
change from sharp bends within the air mass to smooth curves at the front
pass smoothly across the front with no change
become closer together at the front and pass through in straight lines
第10题:
a line is weakened by constantly pulling on it in one direction
normal wear on the line is thus distributed to different areas
it prevents the line from kinking or unlaying
it prevents permanent misalignment of the line's internal strands
第11题:
to bring about the uniformity of their culture
to regain their consensus about a common experience
to stay away from negative feelings in their life
to counteract the effects of consensus about society
第12题:
A
B
C
D
第13题:
If a person is unconscious from electric shock,you should first remove him from the electrical source and then ______.
A.administer ammonia smelling salts
B.check for serious burns on the body
C.determine if he is breathing
D.massage vigorously to restore circulation
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第21题:
musical skill varies greatly from person to person within a population
it is not as aggressive an activity as hunting is
it is found in some cultures but not others
it does not to appear to convey an obvious survival benefit
musical skill cannot be inherited
第22题:
whose behavior usually leads to serious health problems
who is always ready to fight
who usually has doubts about the people around him
whose behavior usually seems strange to the people he knows
第23题:
administer ammonia smelling salts
check for serious burns on the body
determine if he is breathing
massage vigorously to restore circulation