在Magnetic Lasso Tool（磁性套索工具）的选项栏中，Frequency（频率）是用来控制磁性套索工具生成固定点的多少，频率越高，就能越快地固定选择边缘
在Magnetic Lasso Tool（磁性套索工具）的选项栏中，Frequency（频率）是用来控制磁性套索工具生成固定点的多少，频率越高，就能越快地固定选择边缘
相关考题：
Isogonic lines are lines on a chart indicating ______.A.points of equal variationB.points of zero variationC.the magnetic latitudeD.magnetic dip
Lines on a chart which connect points of equal magnetic variation are called ______.A.magnetic latitudesB.magnetic declinationsC.dipD.isogonic lines
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west ________．A.Heeling magnetB.Flinders barC.Fore-and-aft magnetsD.All of the above can be set on magnetic east or magnetic west headings
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south ________．A.Quadrantal spheresB.Heeling magnetsC.Flinders barD.Fore-and-aft magnets
Magnetic compass deviation______．A.varies depending upon the bearing usedB.is the angular difference between magnetic north and compass northC.is published on the compass rose on most nautical chartsD.is the angular difference between geographic and magnetic meridians
Magnetic dip is a measurement of the angle between the ______.A.geographic pole and the magnetic poleB.lubber’s line and true northC.horizontal and the magnetic line of forceD.compass heading and the magnetic heading
下面有关Select菜单下的Grow（扩大选取）和Similar（选取相似）命令，描述正确的是（）。A、它们都是用来扩大选择范围的B、它们都是根据像素的颜色近似程度来增加选择范围的C、它们的选择范围都是由Magic Wand Tool（魔棒工具）选项栏中的Tolerance（容差）来控制的D、它们的选择范围都是由Magnetic Lasso Tool（磁性套索工具）选项栏中的Edge Contrast（边对比度）来控制的
下列哪些工具不可以在起对应的工具选项栏中使用选区运算？（）A、单行选框工具（Single Row marquee Tool）B、自由套索工具（Lasso Tool）C、喷枪工具（Airbrush Tool）D、魔棒工具（Magic Wand Tool）
用于作为真向或磁向的基准。（）A、It is used as a reference to either true nor magnetic direction.B、It is used as a reference to either true or magnetic direction.C、It is used as a reference to neither true or magnetic direction.D、It is used as a reference to neither true nor magnetic direction.
单选题Deviation is caused by（）.Achanges in the earth's magnetic fieldBnearby magnetic land masses or mineral depositsCmagnetic influence inherent to that particular vesselDthe magnetic lines of force not coinciding with the lines of longitude
单选题The magnetic compass magnets are acted on by the horizontal component of the Earth’s total magnetic force. This magnetic force is GREATEST at the（）.Anorth magnetic poleBsouth magnetic poleCmagnetic prime vertical meridianDmagnetic equator
单选题Deviation in a compass is caused by the（）.Avessel's geographic positionBvessel's headingCearth's magnetic fieldDinfluence of the magnetic materials of the vessel
单选题The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is（）.AdeviationBvariationCcompass errorDdip
单选题The permanent magnetism of a vessel may change in polarity due to（）.Abeing moored for a long time on one headingBbeing struck by lightingCsteaming from the north magnetic hemisphere to the south magnetic hemisphereDloading a homogenous magnetic cargo such as steel plate，iron bars，etc
单选题Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.AHeeling magnetBFlinders barCFore-and-aft magnetsDAll of the above can be set on magnetic east or magnetic west headings
单选题The greatest directive force is exerted on the magnetic compass when the（）.Aneedles are nearly in line with the meridianBvessel is near the magnetic polesCvariation is near zeroDvessel is near the magnetic equator
单选题Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.AQuadrantal spheresBHeeling magnetsCFlinders barDFore-and-aft magnets
单选题Magnetic dip is a measurement of the angle between the（）.Ageographic pole and the magnetic poleBlubber's line and true northChorizontal and the magnetic line of forceDcompass heading and the magnetic heading
单选题Variation is the angular measurement between（）.Acompass north and magnetic northBcompass north and true northCmagnetic meridian and the geographic meridianDyour vessel's heading and the magnetic meridian
单选题According to the passage, _____.Awe should not worry about the transition of the Earth’s magnetic fieldBthe Earth’s magnetic field will not change for at least 2000 yearsCthe Earth’s magnetic field has decreased its strength rapidlyDthe transition of the Earth’s magnetic field can be controlled by modern science
单选题The principal purpose of adjustment of the magnetic compass is to eliminate（）as far as possible.AvariationBcompass errorCdeviationDearth's magnetic force
单选题The magnetic compass operates on the principle that（）.Alike magnetic poles attractBunlike magnetic poles repelCunlike poles attractDthe poles of the compass line up with the geographic poles of the earth
单选题The line which connects the points of zero magnetic dip is（）.AAn agonic lineBThe magnetic equatorCA magnetic meridianDAll of the above
单选题Magnetic compass deviation（）.Avaries depending upon the bearing usedBis the angular difference between magnetic north and compass northCis published on the compass rose on most nautical chartsDis the angular difference between geographic and magnetic meridians