Magnetic heading differs from compass heading by（）.

A . If the quadrantal spheres are out as far as possible replace them with smaller spheres B . If the quadrantal spheres are in as far as possible remove one of the spheres C . If the quadrantal spheres are in as far as possible replace them with smaller spheres D . If the quadrantal spheres are out as far as possible，move the quadrantal spheres i

A . variation B . deviation C . compass error D . drift

A . 正确 B . 错误

A . the deviation has been offset by the variation B . there is something wrong with the compass C . the compass is being influenced by nearby metals D . there is no deviation on that heading

A . Move the quadrantal spheres closer to the compass B . Raise the heeling magnet if the red end is up C . Remove some of the Flinders bar D . Raise or lower the athwartship magnet

A . the vessel's heading B . sea conditions C . seasons D . the vessel's positio

A . Flinders bar should be inverted B . Heeling magnet should be inverted C . The quadrantal spheres should be rotated 180° D . Flinders bar should be moved to the opposite side of the binnacle

A . Heeling magnet B . Flinders bar C . Fore-and-aft magnets D . All of the above can be set on magnetic east or magnetic west heading

A . If the blue ends of the magnets are aft，and the fore-and-aft tray is at the top，you should add some magnets. B . If the blue ends of the magnets are aft you should lower the fore-and-aft tray C . If the blue ends of the magnets are aft，and the fore-and-aft tray is at the top，you should reverse the magnets D . If the blue ends of the magnets are forward，and the fore-and-aft tray is at the bottom，you should add some magnet

A . If the quadrantal spheres are all the way out，replace them with smaller spheres B . If the quadrantal spheres are all the way in，replace them with larger spheres C . If the quadrantal spheres are all of the way out，move the spheres in D . If the quadrantal spheres are all the way out，replace them with larger spheres.

A . compass error B . latitude C . variation D . deviatio

A . compass error B . variation C . magnetic dip D . deviatio

A . ship's clock B . engine movement recorder C . repeaters D . navigation light

A . Compass error and variation are equal B . Compass north will be true north C . Variation will equal deviation D . There will be no compass error

A . 正确 B . 错误

A . found in the center(s) of the compass rose(s) B . indicated by isogonic lines C . found in a note on the chart D . All of the above

A . varies depending upon the bearing used B . is the angular difference between magnetic north and compass north C . is published on the compass rose on most nautical charts D . is the angular difference between geographic and magnetic meridia

A、nod B、shave C、wave D、shake

已知广义表LS===((a，b)，(d，e，f))，运用laead和tail函数取出LS中原子e的运算是()。 A．head(tail(LS)) B．tail(head(LS)) C．head(tail(head(tail(LS)))) D．head(tail(tail(head(LS))))

A．path B． window C． response D． process

A．(g) B．(d) C．c D．d