单项选择题

The distance that a ship moves forward with each revolutionof its propeller，if there is no slip，is called（）.

A.advance
B.head reach
C.pitch
D.transfer

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单项选择题

The distance between rivets in a row is known as the（）.

A.arm
B.pitch
C.gage
D.rivet distance

单项选择题

The BEST way to steer a twin-screw vessel if you lose your rudder is by using（）.

A.one engine and a steering oar
B.both engines at the same speed
C.one engine at a time
D.one engine running at reduced speed and controlling the vessel with the other

单项选择题

The area around Cape Charles is（）.

A.low and bare，but the land back of it is high and wooded
B.composed of low to medium rolling hills
C.well defined with rocky outcroppings
D.marked by high，barren hills