單項(xiàng)選擇題A tide is called diurnal when（）.

A.only one high and one low water occur during a lunar day
B.the high tide is higher and the low tide is lower than usual
C.the high tide and low tide are exactly six hours apart
D.two high tides occur during a lunar day


您可能感興趣的試卷

你可能感興趣的試題

1.單項(xiàng)選擇題Your vessel is docking, but not yet alongside. Which line will be the most useful when maneuvering the vessel alongside the pier?（）.

A.Bow breast line
B.Bow spring line
C.Inshore head line
D.Offshore head line

2.單項(xiàng)選擇題What is a CORRECT reply to a pilot’s request, How’s your heading?（）

A.Steady
B.Eased to 10 rudder
C.checked
D.Passing 50

3.單項(xiàng)選擇題Shipboard Emergency Drills must be carried out at least（）on board cargo ship.

A.Once every third year
B.Once a month
C.Once a year
D.Once a week

4.單項(xiàng)選擇題Full details of all lights and fog signals are shown on（）.

A.large scale chart
B.small scale chart
C.ocean chart
D.routing chart

5.單項(xiàng)選擇題What is it called when it is possible to ignite the vapour above the oil?（）

A.Flash point
B.Boiling point
C.Ignition point
D.Pour point