A.timber or steel rails
B.locomotives or boilers
C.railway passenger coaches
D.motor vehicles
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A.acids or alkalies
B.diesel oil
C.acids, but not alkalies
D.alkalies, but not acids
A.stronger
B.thinner
C.more corrosion resistant
D.a lower grade steel
A.GM-available and required
B.Longitudinal stress numberal
C.Tons per inch immersion numeral
D.Draft
A.Mean draft
B.Trim
C.displacement
D.Deadweight
A.wooden blocks or dunnage placed between a deck load and the deck
B.the chains and shackles used to secure to deck cargo
C.a crate in which a deck cargo is packaged
D.cardboard separation pieces placed between deck loads to prevent chafing
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When the wave period and the apparent rolling period are the same（）.
Before any loading takes place any signs of the previous cargo should do（）.
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.
Shipboard Emergency Drills must be carried out at least（）on board cargo ship.
（）is on the panel of radar.
The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.
What is it called when it is possible to ignite the vapour above the oil?（）
In the Northern hemisphere northerly winds may cause temperature（）.
Fog is likely to occur when there is little difference between the dew point and the（）.