-
If you were to set up a VLAN trunk over a Fast Ethernet link on switch R1， which trunk mode would you set the local port to on R1 if you wanted it to respond to requests from its link partner （R2） and become a trunk？ （）
A . Auto
B . Negotiate
C . Designate
D . No negotiate
-
During severe storms when survival becomes a major concern，it may become necessary to relieve high anchor tensions on the windward side of the unit by（）.
A . deballasting the rig
B . ballasting the rig
C . paying out cable on the windward side
D . paying out cable on the leeward side
-
You want to allow Router R1 to immediately become the active router if its priority is highest than the active router fails. What command would you use if you wanted to configure this？ （）
A . en standby preempt
B . standby preempt enable
C . standby preempt
D . hot standby preempt
-
During an engine room watch if immediate action is necessary to ensure safety of the ship its machinery and crew （）
A . the chief engineer must be informed at first
B . the captain must be informed at first
C . it must be taken by the duty engineer
D . the generator engine must be stopped
-
It is necessary to remove （） from the cooling spaces.
A . scar
B . scale
C . spur
D . bilge
-
If a log file becomes corrupted， it may cause the database to stall. How would you correct such a situation？（）
A . Recover the online redo log from backup.
B . Delete and re-create the log file.
C . Use the alter database clear logfile command to clear the log file.
D . Shut down the database and restart it.
E . Shut down the database and then mount it. Clear the log file with the alter database clear logfile command and then restart the database with alter database open resetlogs.
-
If this can’t be settled reasonably, it may be necessary to（）(诉助武力).
-
If it becomes necessary for a stand-on vessel to take action to avoid collision，she shall NOT，if possible，（）
A . decrease speed
B . increase speed
C . turn to port for a vessel on her own port side
D . turn to starboard for a vessel on her own port side
-
It has become necessary to configure an existing serial interface to accept a second Frame Relay virtual circuit.Which of the following processes are required to accomplish this task?（）
A . configure static frame relay map entries for each subinterface network.
B . remove the ip address from the physical interface
C . create the virtual interfaces with the interface command
D . configure each subinterface with its own IP address
E . disable split horizon to prevent routing loops between the subinterface networks
F . encapsulate the physical interface with multipoint PPP
-
If the situation arose where it became necessary to tow a disabled vessel，which statement is TRUE concerning the towing line?（）.
A . The towing line between the two vessels should be clear of the water
B . The towing line should be taut at all times between the vessels
C . There should be a catenary so the line dips into the water
D . None of the above
-
After arrived at the port, if it is necessary to lift the piston out and inspect the M-E temporarily, the chief engineer should report the situation to the（）, and the operation could be performed only after having the approvement of relevant department.
A . maritime safety administration
B . ship survey bureau
C . company manager
D . captai
-
It has become necessary to configure an existing serial interface to accept a second Frame Relay virtualcircuit.Which of the following processes are required to accomplish this task？（）
A . configure static frame relay map entries for each subinterface network.
B . remove the ip address from the physical interface
C . create the virtual interfaces with the interface command
D . configure each subinterface with its own IP address
E . disable split horizon to prevent routing loops between the subinterface networks
F . encapsulate the physical interface with multipoint PPP
-
If the scavenge fire is of a more major nature, if there is a risk of the fire extending or if the scavenge trunk is adjacent to the crankcase with risk of a hot spot developing it sometimes becomes necessary to （）the engine.
A . stop
B . start
C . speed up
D . slow dow
-
It was reported the president had ______ to fight if war was necessary, even if it meant destroying his chances of re-election.
-
5. If it is necessary to look for information or to take another call, offer to __________.8407c446f0bd91b4b2022400762bf541.jpg
-
To find a job，it is not necessary to supply______．
A．a letter for an interview
B．a letter of application
C．an application form
D．a resume
-
A meager diet may give you health and long life, but it's not much fun—and it might not even be necessary. We may be able to hang on to most of that youthful vigor even if we don't start to diet until old age.
Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks. The genetic rejuvenation won't reverse other damage caused by time for the mouse, but could help its liver metabolize drugs or get rid of toxins.
Spindler's team fed three mice a normal diet for their whole lives, and fed another three on half-rations. Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old—equivalent to about 70 human years.
The researchers checked the activity of 11,000 genes from the mouse livers, and found that 46 changed with age in the normally fed mice. The changes were associated with things like inflammation and free radical production—probably bad news for mouse health. In the mice that had dieted all their lives, 27 of those 46 genes continued to behave like young genes. But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes.
"This is the first indication that these effects kick in pretty quickly," says Huber Warner from the National Institute on Aging near Washington, D.C..
No one yet knows if calorie restriction works in people as it does in mice, but Spindler is hopeful. "There's attracting and tempting evidence out there that it will work," he says.
If it does work in people, there might be good reasons for rejuvenating the liver. As we get older, our bodies are less efficient at metabolizing drugs, for example. A brief period of time of dieting, says Spindler, could be enough to make sure a drug is effective.
But Spindler isn't sure the trade-off is worth it. "The mice get less disease, they live longer, but they're hungry," he says. "Even seeing what a diet does, it's still hard to go to a restaurant and say: 'I can only eat half of that'."
Spindler hopes we soon won't need to diet at all. His company, Life Span Genetics in California, is looking for drugs that have the effects of calorie restriction.
According to the passage, which of the following is NOT true？
A．Eating less than usual might make us live longer.
B．If we go on a diet when old, we may keep healthy.
C．Dieting might not be needed. ~
D．We have to begin dieting from childhood.
-
After arrived at the port, if it is necessary to lift the piston out and inspect the M.Etemporarily, the chief engineer should report the situation to the____, and the operation could be performed only after having the approvement of relevant department.
A.maritime safety administration
B.ship survey bureau
C.company manager
D.captain
-
It's necessary that he _____ in time to attend the meeting .
A.come
B.came
C.comes
D.will come
-
Is it necessary for girls to be on a d to keep slim?
-
听力原文：Man: We all know how plans can fail to fit reality within weeks. The only way to overcome problems is to make sure you've got all the necessary information about the particular situation. Once you have a good understanding of all aspects of the problem, then it becomes clearer what needs to be done next.
(14)
-
Personality is to a large extent inherent——A-type parents usually bring about A-type off-spring. But the environment must also have a (1)_____ effect, since if competition is important to the parents, it is likely to become a (2)_____ factor in the lives of their children.
One place where children (3)_____ A-characteristics is school, which is, by its very nature, a highly competitive institution. Too many schools adopt the 'win at all costs' moral standard and (4)_____ their success by sporting (5)_____ The current passion for making children compete against their classmates or against the clock produces a two-layer system, in which competitive A-type seem in some way better than their B-type fellows. Being too (6)_____ to win can have dangerous (7)_____: remember that Pheidippides, the first marathon runner, dropped (8)_____ seconds after saying: "Rejoice, we (9)_____!"
(10)_____ the worst form. of competition in schools is the disproportionate emphasis on examinations. It is rare that school (11)_____ pupils to concentrate on those things they do well. The merits of competition by examination are somewhat (12)_____, but competition in the certain knowledge of failure is positively harmful.
Obviously, it is neither practical nor (13)_____ that all A-youngsters change into B's. The world needs different kinds of person, and schools have an important duty to try to fit a child's personality to his possible future (14)_____ It is top management.
If the (15)_____ of schools with academic work was (16)_____, more time might be spent teaching children surer values. Perhaps selection for the (17)_____ professions, especially medicine, could be made less by good grades in chemistry and more by such (18)_____ as (19)_____ and sympathy. It is surely a mistake to choose our doctors exclusively from A-type stock. B's are important and should be (20)_____.
A．prevailing
B．profound
C．precautionary
D．progressive
-
A volcano is considered active if it has eruptedwithin recent recorded history. If a volcano has little and looks fairly fresh, it is considereddormant with the ability to become active again
A．adverse
B．chronologic
C．unravel
D．erosion
-
In“If it were not for the rain, the crops would become withered.”the underlined part means closest to“____”.
A.Without the rain
B.Because of the rain
C.Since the rain
D.Despite the rain
