单选题One method of controlling rats on vessels is by rat-proofing. Rat-proofing is accomplished by （）.Ainstalling rat guards on the mooring lines when in portBkeeping foods protected and avoiding the accumulation of garbageCeliminating possible living spaces for rats when the ship is constructedDtrapping and/or poisoning the rats
单选题
One method of controlling rats on vessels is by rat-proofing. Rat-proofing is accomplished by （）.
A
installing rat guards on the mooring lines when in port
B
keeping foods protected and avoiding the accumulation of garbage
C
eliminating possible living spaces for rats when the ship is constructed
D
trapping and/or poisoning the rats
参考解析
解析：
暂无解析
相关考题：
Which one of the following is not an acquisition method?A advertisingB invitationC negotiationD purchaseE all are acquisition methods
There are many methods in the CPETT .One of them is the method that runs a Kernel as the load of a computer.So we call itA．Monitor methodB．Model methodC．Benchmark methodD．Physical method
In C language, one method of communicating data between functions is by ______.A．argumentsB．variablesC．messagesD．constants
the grammar－translation method was at one time called ______ since it was first used in the teaching of the classical languages of latin and greek. A、classical MethodB、minimum methodC、audiolingual MethodD、aural-oral method
Vessels having main engines arranged for air starting are to be provided with at least__.A.one automatic drain serving both containersB.two air starting containers of approximately equal sizeC.one control air container and one starting air containerD.one additional means of starting the main engine
A head on situation shall be deemed to exist at night when a power-driven vessel sees another power-driven vessel ahead and ______.A.one sidelight and the masthead light are visibleB.the vessels will pass closer than half a mileC.both vessels sound one prolonged blastD.both sidelights and masthead light(s) are visible
The required number and type of hand portable fire extinguishers for staterooms on cargo vessels is ______.A.one A-IB.one B-IC.one C-ID.none required
There is a ______ when one or more vessels are towing or pushing another vessel or vessels，provided that they are all involved in commercial activities and not in a salvage operation．A.private safetyB.private maritime adventureC.common safetyD.common maritime adventure
There are many different ways of presenting grammar in the classroom. Among them, three are most frequently used and discussed. Which one does not be|ong to them?A．The deductive method.B．The inductive method.C．The guided discovery method.D．The productive method.
共用题干第二篇Exercise and BrainJust as exercise strengthens the heart and lungs,bones and muscles,it may also power up the brain.A succession of scientific studies of animals implies that physical activity has a positive effect on mental functioning."It's clear that the brain benefits from exercise,"says brain scientist William Greenough of the University of Illinois at Urbana-Champaign.His studies with rats have demonstrated two primary effects of activity:Vigorous physical exercise provides the brain with more fuel,and skill-based ex-ercise increases the formation of connections in the brain, which, according to the proposals of some scientists,may make the brain better able to process information.In one experiment,laboratory rats were separated into three groups.One group was exercised by running inside an automatic wheel,a second group improved their skills in a complicated obstacle course,and a third group was inactive."The animals that learned to go through the obstacle course exhibited a greater number of brain connections than the animals in the exercised or inactive groups,"Greenough said."In contrast, the animals that exercised inside the automatic wheel possessed a greater density of blood vessels in the brain than did either of the other two groups of animals."Learning a new dance step may boost the brain in the same way that learning a language can, he says.And if the dance is a good physical exercise as well,the benefits multiply.Young brains may be especially able to boost brain power through exercise,suggested another of Greenough's experiments that showed the most significant changes in the brain occurred among rats that had been exercised when very young.And while animals aren't people,he says it is logical to make the inference that an effect found in rats may also apply to humans.Human studies have focused primarily on older adults and suggest that regular exercise can improve the speed with which the brain processes information.Measurements made by Arthur Kramer at the University of Illinois demonstrated that inactive adults,aged 63 to 82,could hit buttons faster in response to a tone after they went through a 10-week water exercise course.A corresponding control group that didn't exercise showed no improvement.Which statement about the experiment of lttboratory rats is correct?A:One group was exercised by running circles inside.B:One group was exercised in a complicated obstacle course outside.C:The animals that learned to go through the obstacle course exhibited a greater number of brain cells than the animals in the exercised or inactive groups.D:The animals that exercised inside the automatic wheel possessed a greater density of blood vessels in the brain than did either of the other two groups of animals.
Rats and other animals need to be highly at tuned to social signals from others so that can identify friends to cooperate with and enemies to avoid.To find out if this extends to non-living beings,Loleh Quinn at the University of California,San Diego,and her colleagues tested whether rats can detect social signals form robotic rats.They housed eight adult rats with two types of robotic rat-one social and one asocial一for 5 our days.The robots rats were quite minimalist,resembling a chunkier version of a computer mouse with wheels-to move around and colorful markings.During the experiment,the social robot rat followed the living rats around,played with the same toys,and opened caged doors to let trapped rats escape.Meanwhile,the asocial robot simply moved forwards and backwards and side to side Next,the researchers trapped the robots in cages and gave the rats the opportunity to release them by pressing a lever.Across 18 trials each,the living rats were 52 percent more likely on average to set the social robot free than the asocial one.This suggests that the rats perceived the social robot as a genuine social being.They may have bonded more with the social robot because it displayed behaviours like communal exploring and playing.This could lead to the rats better remembering having freed it earlier,and wanting the robot to return the favour when they get trapped,says Quinn.The readiness of the rats to befriend the social robot was surprising given its minimal design.The robot was the same size as a regular rat but resembled a simple plastic box on wheels.“We'd assumed we'd have to give it a moving head and tail,facial features,and put a scene on it to make it smell like a real rat,but that wasn’t necessary,”says Janet Wiles at the University of Queensland in Australia,who helped with the research.The finding shows how sensitive rats are to social cues,even when they come from basic robots.Similarly,children tend to treat robots as if they are fellow beings,even when they display only simple social signals.“We humans seem to be fascinated by robots,and it turns out other animals are too,”says Wiles.What did the social robot do during the experiment?A.It followed the social robot.B.It played with some toys.C.It set the trapped rats free.D.It moved around alone.
Rats and other animals need to be highly at tuned to social signals from others so that can identify friends to cooperate with and enemies to avoid.To find out if this extends to non-living beings,Loleh Quinn at the University of California,San Diego,and her colleagues tested whether rats can detect social signals form robotic rats.They housed eight adult rats with two types of robotic rat-one social and one asocial一for 5 our days.The robots rats were quite minimalist,resembling a chunkier version of a computer mouse with wheels-to move around and colorful markings.During the experiment,the social robot rat followed the living rats around,played with the same toys,and opened caged doors to let trapped rats escape.Meanwhile,the asocial robot simply moved forwards and backwards and side to side Next,the researchers trapped the robots in cages and gave the rats the opportunity to release them by pressing a lever.Across 18 trials each,the living rats were 52 percent more likely on average to set the social robot free than the asocial one.This suggests that the rats perceived the social robot as a genuine social being.They may have bonded more with the social robot because it displayed behaviours like communal exploring and playing.This could lead to the rats better remembering having freed it earlier,and wanting the robot to return the favour when they get trapped,says Quinn.The readiness of the rats to befriend the social robot was surprising given its minimal design.The robot was the same size as a regular rat but resembled a simple plastic box on wheels.“We'd assumed we'd have to give it a moving head and tail,facial features,and put a scene on it to make it smell like a real rat,but that wasn’t necessary,”says Janet Wiles at the University of Queensland in Australia,who helped with the research.The finding shows how sensitive rats are to social cues,even when they come from basic robots.Similarly,children tend to treat robots as if they are fellow beings,even when they display only simple social signals.“We humans seem to be fascinated by robots,and it turns out other animals are too,”says Wiles.Quin and her colleagues conducted a test to see if rats can________A.pickup social signals from non-living ratsB.distinguish a friendly rat from a hostile oneC.attain sociable traits through special trainingD.send out warning messages to their fellow
At one time（）was called Classical Method since it was first used in the teaching of the classical languages of Latin and Greek.
单选题Which one of following statement is not true concerning the suitable sites of the direct acting relief valve and the pilot operated relieve valve?（）Athe direct acting relief valve is used for controlling lower flows and pressureBthe pilot operated relief valve is used for controlling higher flows and pressureCthe pilot operated relief valve is used for controlling lower flows and pressureDthe controlling accuracy of direct acting relief valve is worse than that of the pilot operated relief valve
单选题The steering and sailing rules for vessels in restricted visibility apply to vessels（）.Ain sight of one another in fogBnavigating in or near an area of restricted visibilityConly if they are showing special purpose lightsDonly if they have operational radar
单选题A stand-on vessel in a crossing situation is allowed to take action when （）.Aon a collision courseBthe vessels will pass within one mileCit becomes apparent to her that the give-way vessel is not taking appropriate actionDthe relative speed of the vessels indicates collision in less than six minutes
单选题Vessels shall be deemed to be in sight of one another only when one（）from the other.Acan be observed visuallyBcan be observed by radarCcan be located on the radarDcan be heard
单选题Which statement is true？（）A If only one thread is blocked in the wait method of an object， and another thread executes the modify on that same object， then the first thread immediately resumes execution.B If a thread is blocked in the wait method of an object， and another thread executes the notify method on the same object， it is still possible that the first thread might never resume execution.C If a thread is blocked in the wait method of an object， and another thread executes the notify method on the same object， then the first thread definitely resumes execution as a direct and sole consequence of the notify call.D If two threads are blocked in the wait method of one object， and another thread executes the notify method on the same object， then the first thread that executed the wait call first definitely resumes execution as a direct and sole consequence of the notify call.
单选题Which one of two crossing power-driven vessels has the right of way in a fog（）.ABoth vesselsBNeither vesselCThe vessel on portsideDThe vessel on starboard side
单选题A METHOD OF TOWING VESSELS THROUGH POLAR ICE BY MEANS OF ICEBREAKING TUGS WITH A SPECIAL STERN NOTCH SUITED TO RECEIVE AND HOLD THE BOW OF THE VESSEL TO BE TOWED defines（）.ATowing operationsBRigid coupled towingCClose coupled towingDHard coupled towing
单选题When two vessels are in sight of one another and NOT in or near an area of restricted visibility，any of the following signals may be given EXCEPT（）.Aa light signal of at least five short and rapid flashesBone prolonged，one short，one prolonged，and one short whistle blastsCfour short whistle blastsDtwo short whistle blasts
单选题If two sailing vessels are running free with the wind on the same side, which one must keep clear of the other?（）.AThe one with the wind closest abeamBThe one to windwardCThe one to leewardDThe one that sounds the first whistle signal
单选题Several merchant ships are arriving at the scene of a distress incident. One of the them must assume the duties of the Coordinator Surface Search (CSS). Which of the following statements is TRUE? （）ACSS duties are always assumed by passenger vessels，dry cargo vessels，or tankers in that order of precedenceBThe CSS must be established by mutual agreement between the ships concernedCA tank vessel should never be assigned CSS duties unless only tank vessels are presentDThe first vessel to arrive at the distress incident is designated as the CSS
单选题If one hydraulic pump of an electro-hydraulic steering unit falls, the vessels steering can be initially and best maintained by using the （）.Atrick wheelBaccumulatorCstandby pumpDtelemotor
单选题A head on situation shall be deemed to exist at night when a power-driven vessel sees another power-driven vessel ahead and （）.Aone sidelight and the masthead light are visibleBthe vessels will pass closer than half a mileCboth vessels sound one prolonged blastDboth sidelights and masthead light(s) are visible
单选题When one of two vessels（）is required to keep out of the way the other must keep her course and speed.AIn sight of anotherBSights the anotherCNot in sight of the otherDIn sight of one another
单选题The preferred method of controlling external bleeding is by（）.Adirect pressure on the woundBelevating the wounded areaCpressure on a pressure pointDa tourniquet above the wound