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线间距离 distance between tracks
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考题
—What is ___________ distance between Beijing University and Qing Hua University?—Sorry, I don’t know it exactly, but the two universities are within __________ easy distance?
A.the;不填B.the;anC.不填;anD.不填;不填
考题
The distance between any two meridians measured along a parallel of latitude and expressed in miles is the ______.A.difference in longitudeB.mid-longitudeC.departureD.meridian angle
考题
Which statement concerning current is TRUE ________．A.Current can be determined by measuring the direction and distance between simultaneous EP and DR positionsB.The drift of the current should be averaged out on a one hour basisC.After the current is determined，it should not be used for further plotting because it is an unknown variableD.The distance between a simultaneous DR position and fix is equal to the drift of the current
考题
For an upright vessel, draft is the vertical distance between the keel and the ______.A.waterlineB.freeboard deckC.plimsoll markD.amidships section
考题
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Spacing in Animals1. Any observant person has noticed that a wild animal will allow a man or other potential enemy to approach only up to a given distance before it flees.“Flight distance”is the terms used for this interspecies spacing. As a general rule,there is a positive relationship between the size of an ani-mal and its flight distance-the larger the animal,the greater the distance it must keep between itself and the enemy.An antelope will flee when the enemy is as much as five hundred yards a-way .The wall lizard's flight distance,on the other hand,is about six feet. Flight is the basic means of survival for mobile creatures.2. Critical distance apparently is present wherever and whenever there is a flight reaction.“Criti-cal distance”includes the narrow zone separating flight distance from attack distance.A lion in a zoo will flee from an approaching man until it meets a barrier that it cannot overcome.If the man continues the approach,he soon penetrates the lion's critical distance,at which point the cor-nered lion reverses direction and begins slowly to stalk the man.3 .Social animals need to stay in touch with each other. Loss of contact with the group can be fatal for a variety of reasons including exposure to enemies.Social distance is not simply the dis- tance at which an animal will lose contact with his group-that is,the distance at which it can no longer see,hear,or smell the group-it is rather a psychological distance,one at which the animal apparently begins to feel anxious when he exceeds its limits.We can think of it as a hidden band that contains the group.4. Social distance varies from species to species.It is quite short-apparently only a few yardsamong some animals,and quite long among others.5. Social distance is not always rigidly fixed but is determined in part by the situation.When the young of apes and humans are mobile but not yet under control of the mother's voice,social distance may be the length of her reach.This is readily observed among the baboons in a zoo.When the baby approaches a certain point,the mother reaches out to seize the end of its tail and pull it back to her. When added control is needed because of danger,social distance shrinks.To show this in man,one has only to watch a family with a number of small children holding hands as they cross a busy street. If an animal's critical distance is penetrated,it will______.A: differs among animal speciesB: to psychological distanceC: begin to attackD: to physiological distanceE: distance between an animal and its enemy before fleeingF: distance between certain animal species before fleeing
考题
共用题干
Spacing in Animals1. Any observant person has noticed that a wild animal will allow a man or other potential enemy to approach only up to a given distance before it flees.“Flight distance”is the terms used for this interspecies spacing.As a general rule,there is a positive relationship between the size of an ani-mal and its flight distance-the larger the animal,the greater the distance it must keep between itself and the enemy.An antelope will flee when the enemy is as much as five hundred yards a-way .The wall lizard's flight distance,on the other hand,is about six feet. Flight is the basic means of survival for mobile creatures.2. Critical distance apparently is present wherever and whenever there is a flight reaction.“Criti-cal distance”includes the narrow zone separating flight distance from attack distance.A lion in a zoo will flee from an approaching man until it meets a barrier that it cannot overcome.If the man continues the approach,he soon penetrates the lion's critical distance,at which point the cornered lion reverses direction and begins slowly to stalk the man.3. Social animals need to stay in touch with each other. Loss of contact with the group can be fa-tal for a variety of reasons including exposure to enemies.Social distance is not simply the dis-tance at which an animal will lose contact with his group-that is,the distance at which it can no longer see,hear,or smell the group-it is rather a psychological distance,one at which the ani- mal apparently begins to feel anxious when he exceeds its limits.We can think of it as a hidden band that contains the group.4. Social distance varies from species to species. It is quite short-apparently only a few yards- among some animals,and quite long among others.5. Social distance is not always rigidly fixed but is determined in part by the situation.When the young of apes and humans are mobile but not yet under control of the mother's voice,social dis-tance may be the length of her reach .This is readily observed among the baboons in a zoo .When the baby approaches a certain point,the mother reaches out to seize the end of its tail and pull it back to her. When added control is needed because of danger,social distance shrinks.To show this in man,one has only to watch a family with a number of small children holding hands as they cross a busy street. The most appropriate definition of Flight Distance is______.A: differs among animal speciesB: to psychological distanceC: begin to attackD: to physiological distanceE: distance between an animal and its enemy before fleeingF: distance between certain animal species before fleeing
考题
单选题The characteristics of good distance learning programs are the following EXCEPT _____.A
students don’t have to travel away from home to take a testB
the content of distance learning program is the same as that of the full time program in colleges and universitiesC
the good distance learning programs include courses that are not taught in average universitiesD
the relationship between students and professors are one-to-one
考题
单选题The distance between rivets in a row is known as the（）.A
armB
pitchC
gageD
rivet distance
考题
单选题The shortest distance between any two points on earth defines a（）.A
small circleB
great circleC
rhumb lineD
hyperbola
考题
单选题When we say that two objects have relative motion, we mean （）.A
the distance between them remains the sameB
the distance between them is changingC
the position between them is not changingD
their positions to the earth remain the same
考题
单选题The distance between any two meridians measured along a parallel of latitude and expressed in miles is the （）.A
difference in longitudeB
mid-longitudeC
departureD
meridian angle
考题
单选题A distance piece, known as a （） may be interposed between the rod and the bearing housing.A
bearing shellB
bearing linerC
compression plateD
lead wire
考题
单选题（）is the distance east or west measured in degrees，minutes and seconds of arc on the equator between the prime meridian and the meridian passing through the place.A
LongitudeB
LatitudeC
HeightD
Bearing
考题
单选题For an upright vessel, draft is the vertical distance between the keel and the （）.A
waterlineB
freeboard deckC
Plimsoll markD
amidships section
考题
多选题Which two methods can be used to prevent or reduce RFI from colocated directional antennas（）AAlternate polarization between colocated antennasBCross-polarize antennas between endpointsCInstall an RF-shielded box around the antennasDIncrease the distance between the antennas
考题
单选题If you were being assisted by an icebreaker and he sent you the single letter Q，he would be telling you（）.A
that he has his engines in reverseB
that he is shortening the distance between vesselsC
to shorten the distance between vesselsD
that his vessel is healthy
考题
单选题Which statement concerning current is TRUE（）.A
Current can be determined by measuring the direction and distance between simultaneous EP and DR positionsB
The drift of the current should be averaged out on a one hour basisC
After the current is determined，it should not be used for further plotting because it is an unknown variableD
The distance between a simultaneous DR position and fix is equal to the drift of the current
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