A.celestial meridian
B.celestial equator
C.celestial horizon
D.principal vertical circle
您可能感興趣的試卷
你可能感興趣的試題
A.south celestial pole
B.north celestial pole
C.observer's meridian
D.Greenwich meridian
A.transmit the thrust of the engine to the propeller
B.transmit the thrust of the propeller to the vessel
C.absorb the shock of wave pressure at the bow
D.be placed between the engines and the foundation to absorb the vibration
A.altostratus
B.stratus
C.cumulus
D.cirrus
A.The moment of inertia would remain unchanged
B.The moment of inertia would be 1/4 its original value
C.The moment of inertia would be 1/2 the original value
D.None of the above
A.equally sharing the load
B.jammed together
C.as far apart as possible
D.rove to the highest mechanical advantage
最新試題
A special daymark is a（）.
A vertex of the navigational triangle is NOT located at the（）.
A spanner is a （）.
A sufficient amount of chain must be veered when anchoring a vessel to ensure（）.
A towline should be fastened to（）.
A towing light is（）.
A traffic separation zone is that part of a traffic separation scheme which（）.
A tug is best positioned for towing and maneuvering on rivers and other restricted waters where wave action is limited when（）.
A tow can override its tug as a result of（）.
A thin，whitish，high cloud popularly known as “mares’ tails” is（）.